Category Archives: Environmental Impact

What are the Different Ways in which Humans Cause Pollution?

What are the Different Ways in which Humans Cause Pollution?

What are the different ways in which humans cause pollution? How many can you think of? Topics like climate change, and sewage spills get a lot of press, but what else is there and how do we measure it?

Plastic Pollution covering Accra beach – Muntaka Chasant

The Main Culprits

A quick enquiry on Google Gemini reveals the the top 3 most discussed enviromtal pollutant on the web, are:

  • Plastic Pollution: This is a major concern due to its persistence in the environment and its harmful effects on wildlife and ecosystems. Plastic pollution is often discussed in terms of microplastics, which are tiny pieces of plastic that can be ingested by animals and accumulate in the food chain.
  • Air Pollution: This is another major environmental concern, as it can have significant impacts on human health and the environment. Air quality is often discussed in terms of particulate matter, which can be inhaled and cause respiratory problems.
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  • Water Pollution: This is also a major concern, as water is essential for life. Water pollution can come from a variety of sources, such as industrial waste, agricultural runoff, and sewage. Water pollution can contaminate drinking water and harm aquatic ecosystems.

These are quite generic categories, and certainly air and water pollution can occur via contamination with numerous substances, which can include . .  plastic.

So let’s break this down a bit:

A Long List of Negative Impacts

Below we have a list of impacts that are considered in life cycle assessment, but they are not pollutants. However, they do represent pollutants. For example ozone depletion, would take in to account release of CFCs or HCFCs when manufacturing a product.

Below list we look, at an actual ist of pollutants that we test for in water and soils samples.

  • ecotoxicity: freshwater
  • ozone depletion
  • acidification
  • eutrophication: marine (EP)
  • eutrophication: terrestrial (EP)
  • eutrophication: freshwater (EP)
  • human toxicity: non-carcinogenic
  • photochemical ozone formation: human health
  • human toxicity: carcinogenic
  • particulate matter formation
  • ionising radiation: human health
  • material resources: metals/minerals
  • energy resources: non-renewable
  • land use
  • water use (WDP)
  • climate change
  • climate change: fossil
  • climate change: land use and land use change
  • climate change: biogenic
  • biogenic carbon content in accompanying packaging
  • biogenic carbon content in product
  • Cumulative Energy Demand – non-renewable energy resources
  • Cumulative Energy Demand – renewable energy resources
  • exported energy – electricity
  • exported energy – heat
  • hazardous waste disposed
  • high-level radioactive waste disposed
  • intermediate and low-level radioactive waste disposed
  • materials for energy recovery
  • materials for recycling
  • non-hazardous waste disposed
  • PENRE (non-renewable primary energy as an energy carrier in a life cycle assessment)
  • PENRM (primary energy non-renewable, material)
  • PERE (
  • PERM
  • recovered energy
  • use of net fresh water
  • use of renewable secondary fuels
  • use of secondary material

A List of Actual Pollutants

So below are a list of pollutants, rather than the above list of impacts. You will note some of these are “famous” poisons.

Arsenic Popular with Unimaginative Murderers

So of the below pollutants are more nasty than others, there are some famous ones (if you read agatha Christie Novels)  such as Arsenic, but have you ever heard of Dibenzo[a,h]anthracene? The safe level of Dibenzo[a,h]anthracene in soil, is around 60 times lower than that for Arsenic. This does not mean it is 60 times more toxic, but it gives an idea of how nasty Dibenzo[a,h]anthracene is!

  • Boron (hot water soluble)
  • Sulfate (2:1 water soluble) as SO4
  • Sulfur (elemental)
  • Cyanide (free)
  • Cyanide (total)
  • Sulfide
  • Sulfate (total)
  • Arsenic
  • Cadmium
  •  Chromium
  • Copper
  • Mercury
  • Nickel
  • Lead
  • Selenium
  • Zinc
  • Chromium (hexavalent)
  • TPH >C6-C10
  • TPH >C10-C21
  • TPH >C21-C40
  • Total Petroleum Hydrocarbons
  • Naphthalene
  • Acenaphthylene
  • Acenaphthene
  • Fluorene
  • Phenanthrene
  • Anthracene
  • Fluoranthene
  • Pyrene
  • Benzo[a]anthracene
  • Chrysene
  • Benzo[b]fluoranthene
  • Benzo[k]fluoranthene
  • Benzo[a]pyrene
  • Dibenzo[a,h]anthracene
  • Indeno[1,2,3-cd]pyrene
  • Benzo[g,h,i]perylene
  • Total (of 16) PAHs
  • Benzene
  • Toluene
  • Ethyl benzene
  • m- & p-Xylene
  • o-Xylene
  • Phenols (total)
  • pH

Wonder Chemicals

One of humans’ favorite way of causing really bad pollution is with new wonder chemicals:

  • Asbestos
  • DDT
  • PCB
  • PFAS

In order of appearance the above short list of chemical has been released into the environment before anyone really understand them.

Asbestos was thought to be a very good flame / heat resistant material (which is was) but people overlooked (or ignored) it crystal structure and the effect that would have on delicate lung tissue. We are still cleaning up asbestos now, 40 years after is was passed out.

DDT & PCB are both very “persistent” chemicals they don’t break down, as so are prone to bioaccumulation. Which is why inuit mother’s breast milk has been found to be toxic, despite them living in a seemingly pristine environment.

Blood PCB levels in humans, observed across the Arctic – https://www.eea.europa.eu/

And more recently a group of chemical associated with fire retardation called PFAS or PFOS, are turning up absolutely everywhere, manufactures have been putting these forever chemicals in paper bags (for grease proofing) and as using them as flame retardants, and now guess what! They are turning up in people water supplies.

Conclusions

There are a mesmerising number of ways in which humans can pollute our environment. We can pollute the air, water and the soil. All things we rely on to exist.

There is also a mind boggling number of ways we can impact the planet, and and very long list of substances to do it with.

We are still learning about all of these interactions, and substances, and we are very prone to repeating mistakes.

The one to watch is plastic pollution . We each of us eat and drink 1000’s of particles a day, and that number will get higher, and subjectively speaking there is no way that can pan out well for humans (or the ecosphere) in the long run.

Why Plastic Pollution is the Most Important Environmental Issue

Why Plastic Pollution is the Most Important Environmental Issue

The world Health Organisation considers air pollution to be the most pressing environmental issue at present, they are wrong about this. The most pressing environmental issue today is plastic pollution and in this blog post I will outline why this is the case. We are only just beginning to see the environmental impact and health impact from plastic pollution.

Air Pollution – Reversible Degradation

Air pollution (air quality) to the greater extent is created by combustion of fuels in typically urban environments. Gases such as nitrous oxide and tiny particles such as PM2.5 and PM10 can cause detrimental effects to those who inhale them on a regular basis however we have seen time and time again around the world that this type of Air Pollution can be rapidly reversed.

For example the clean air act implemented in 1970s California led to a rapid increase in air quality and similarly.

Between 2016 and 2023, London’s annual average NO2 concentrations dropped by 49%, which is almost double the rate of the rest of England.

Efforts in the UK to improve air quality have been fairly successful especially now given the uptake of electric and hybrid vehicles and the establishment of clean air zones in cities around the country we’re successful these have led to an almost immediate approvement improvement in air quality which just gave the show that although air quality is a serious problem it can be dealt with quickly with some very simple policy changes.

With air quality if you remove the inputs the problem is largely cured.

Plastic Pollution – Irreversible Degradation

Plastic pollution is not like air pollution if you take away the input the problem is still there the plastic just doesn’t disappear, it doesn’t dissipate, it doesn’t go away. In fact we’ve already got a bit of a time bomb on our hands with the amount of plastic that is in the environment and waiting to break down as we speak.

Although large chunks of plastic on a beach or floating around the ocean can look unsightly they are not really the problem. The problem starts when these large chunks get broken down and smaller and smaller pieces and end up being ingested by various creatures whether they be on land or on Sea.

There are also countless quadrillions of plastic particles which are discharged which are already small such as lint from washing, or particles from car tires all of these being washed into Rivers down into the sea and entering the food chain.

52,050 to 233,000 plastic particles/g depending on vegetable samples.

You only need to look at the measurable percentages of plastic found in many fish for example to realise that plastic even now is a problem. We are eating it all the time, as well as breathing it in (nod back to air quality) and if by some miracle tomorrow there was some agreement, some global agreement ,to see all production of plastic stop. Then we would still have quadrillions of tons of plastic in the environment waiting to break down into tiny particles and to leak into our food chain. The food we feed to our kids.

In Tunisia, 92.5% of sardines have microplastics in their digestive tracts.

So this is why plastic pollution needs to be knocked right up the list first place because the longer we take to put forward a decent response (near 100% ban on single use plastic) then we are just building an ever more dystopian future for ourselves. What will that look like:

  • where wild food from the sea and from the land cannot be eaten
  • we’ll have to grow all food in Sheds because the soil is so contaminated

This might sound a bit far-fetched but it’s already happening plastic is in our food and at some point it will get to a concentration where the health effects become very much measurable with more and more acute effects on our health.

People Against Plastic Pollution 

Environmental Research Ideas & Topics

Environmental Research Ideas & Topics

I our day to day report writing and in conversations with clients, we hear of topics for which we then subsequently find gaps in available data. We have listed these Environmental Research Ideas & Topics below. So if you are conducting research at any level, and in any part of the world you might pick one, and advance our understanding.

We will update this post with new topics as we think of them.

5 – Over Application of Nutrients (Added October 2024)

We have heard in some instances that industrial farms (in this case in the UK) are over applying nutrients to Farmland. The example we heard about was a poultry farm where the volumes of poultry manure being produced were very large and these were then being spread to surrounding Farmland without following the guidance on nutrient balancing as provided in our RB209 for example and this is lead to in effect sterility in the land owning to an over concentration of macaroni nutrients this is entirely unsubstantiated claim coming from a phone call but it might be that there is some truth in there somewhere.

4 – Suitability of Compost Regulation in the UK (Added October 2024)

Regulations relating to composting i the UK and very confused. This comes from the waste / non- waste split. Which some producers manage to avoid, and others not so. This can lead to huge commercial enterprising circumnavigating requirements for an environmental permit, and then small farm sized operations requiring very complicated environmental permits.

3 – Export vs Recycling vs Incineration Rates for Plastic (Added October 2024)

Every week we hear of wildly differing claims with regards to “recycling” rates. The recent lawsuit between California and ExxonMobil, aims to provide that recycling has been pushed by producers as a “cure-all” for plastic waste. When in fact no more than 9% is recycled.

And that basis there is plenty of research to be done in your area to see what happens to plastic wastes. Do they get recycled or not. Where do they go. In the Uk we saw how our segregated (not recycled) waste gets exported to countries where it is not recycled.

2 –  Microplastics from Sewage Sludge (Added October 2024)

When sewage is treated at a sewage treatment works, or a smaller treatment system, a sludge is created. How much microplastic is in this sludge? And what happens to it? WHich types of treatment create the most, and is ther a way of reducing it?

1 – Microplastics from Car Tyres (Added October 2024)

Over the lifetime of a tire, whilst is wears down, it loses about 30% of its weight. These tiny abraded particles end up where? What is there volume? Where can we do to stop this? Are there additional materials that we could use that are better than materials at present?

Top 5 Environmental Issues in Exeter

Top 5 Environmental Issues in Exeter

Here are the top 5 environmental issues in Exeter, Devon, UK. SWEL are Environmental Consultants based in Exeter, and are well placed to solve the below problems.

Air Pollution

Similar to many urban areas in the UK, Exeter struggles with air pollution. Traffic congestion, domestic solid fuel burning, and industrial activities contribute to elevated levels of nitrogen dioxide (NO2) and particulate matter (PM2.5) in the air. These pollutants can cause respiratory problems, heart disease, and even lung cancer.

Image of Air pollution in Exeter

Climate Change

Exeter, like most places globally, is experiencing the effects of climate change. This includes rising temperatures, increased frequency and intensity of extreme weather events like flooding and heatwaves, and rising sea levels. These changes pose a significant threat to the city’s infrastructure, natural environment, and public health.

Climate change will exacerbate flood risk in exeter.

Exeter City Council has made a Climate Emergency declaration, the Council’s Net Zero plan, and other sustainability initiatives: https://exeter.gov.uk/climate-emergency/net-zero-for-exeter/net-zero-exeter-2030-plan/

Biodiversity Loss

The natural habitats around Exeter are under threat from development, pollution, and climate change. This is leading to a decline in the number and diversity of plant and animal species in the area. The loss of biodiversity can have a knock-on effect on the entire ecosystem, impacting everything from water quality to food security.

“Government conservation policies such as rewilding, organic farming and ‘nature friendly farming’ measures can accelerate global biodiversity loss,” says Ian Bateman – University of Exeter 

Image of Biodiversity loss in Exeter

Waste Management

Exeter faces challenges in managing its waste effectively. The amount of waste generated by the city is increasing, putting pressure on landfill sites and making recycling and composting essential.

If you require a waste disposal service, it is important to check that the company and person taking the refuse away is properly licensed. If not then YOU could get fine.

Water Quality

While the overall water quality in Exeter is good, there are still concerns about pollution from agricultural runoff, sewage discharge, and industrial activity. Protecting water sources and reducing pollution is crucial for maintaining a healthy water supply for the city.

Sewage Works discharging in to the river Exe, such as Countess Wear Sewage Works, spilled raw sewage in to the River Exe 41 times in 2022, and other infrastructure associated with  Countess Wear Sewage Works (Pumping Stations) Spilled an additional 150 times during the same period.

Independent Review of Planning Documents – St Albans

Independent Review of Planning Documents – St Albans

We have recently been offered a small job by St Albans Council to look over a Planning Application, and provide steering on likely Environmental Impacts to the development.

The situation is quite unusual in that the a housing development was being assessed on the basis of proposed impacts from a large mineral working & landfill scheme, that had not yet commenced. 

The mineral working (quarry) scheme in question had been approved by environmental permitting, but planning permission was still pending at the time of our review.

We reviewed the extensive Environmental Impact Assessment that had been submitted in support of the Quarry & Landfill Application.

We made review of the following Environmental Impact Assessment chapters:

  • Noise Impact
  • Dust Impact 

We also recommended for further assessment in following areas:

  •  Bio Aerosol
  • Odour 

The main benefit to the local populace was the restriction of the sites operating hour to standard business hours.

Bio Aerosol and Dust risks typically fall away quite quickly at a distance of 250m from source, as the housing site was within 250 meters of the proposed quarry and landfill we recommended further assessment in these areas.

Odour Impact Assessment – Devon

Odour Impact Assessment – Devon

Southwest Environmental Limited have recently issued an Odour Impact Assessment report for a large poultry unit in Devon.
The report accounts for the placement of a large number of broiler (for meat) chickens in two sheds. 
There were various receptors near site that are sensitive to odour the limit being set at 3.0 eOU/m3.  
We use an AERMOD model to derive a Annual 98th Percentile Mean. 
The model use source inputs, which we referenced from the SCAIL report and receptors  are chosen, based on  proximity and sensitivity.

Ammonia Assessment – Cornwall

Ammonia Assessment – Cornwall

Southwest Environmental Limited have recently completed an Ammonia Assessment for an an agricultural building in Cornwall. 
The building is a large modern dairy unit with  associated yard areas and slurry management infrastructure. 
The brief from the client was to conduct a SCAIL Assessment so as to establish whether the project would screen out using this method of preliminary assessment. The project did not screen out, showing an exceedance of  ammonia deposition and concentration at nearby sensitive ecological receptors. 

Following this we constructed am AERMOD model to incorporate all features of the proposed development, and determined deposition and concentrations at the receptors that did not screen out in the SCAIL Assessment.
Our model return ed a positive result and we have submitted the report for assessment by Natural England.  

Noise Assessment – Camden – London

Southwest Environmental Limited  have been asked to prepare a Noise Assessment for a site on Camden High Street.  

Camden High Street is a short stretch of road (less than 500m long, forming part of the A400) in Camden Town, in north-northwest London.

KOKO, the former Camden Palace is in close proximity to the site and as such has been considered as a source of noise in the assessment. That being said planning conditions relating to the refitting and extension of KOKO see very strict noise control limits that should ensure minimal impact if properly enforced.

The report was assembled using secondary data from numerous baseline surveys that had been under taken in the area.

We then derived an appropriate background noise level, and compared this to British Standard noise level criteria, in accordance with BS 4142:214, the prevailing background sound level is not necessarily taken to  be the lowest recorded values, but rather the level that best represents the typical background  sound level during a defined period.

If you have any noise related planning issues, then please call the office for a no obligation discussion.

Air Qaulity Assessment – New Kent Rd, London

Air Quality Assessment – New Kent Rd, London

Southwest Environmental Limited have recently written an Air Quality Assessment for a site on New Kent Rd, London (SE1), the Air Quality Assessment report is for a small scale project. We prepare Air Quality Assessment Reports for any scale of project.

In this case the proposed project was at low risk of creating impacts as it was a single residential dwelling, the main focus of the report was assessment of risk from nearby sources such as New Kent Road.

NOX and Fine Particulate Levels fall off dramatically with distance, proving there is no canyoning effect. But in this case the streets lined with terraced houses do creating a canyoning effect which may prevent the dispersion of air borne pollutants.

This affect is hard to estimate, but we have used a review of nearby reports to make an estimate of air quality at the receptor (house) location and believe this will satisfy planning officials, with burdening the developer with disproportionate costs associated with bespoke modelling.

Image Courtesy of Luton Anderson 

Water Quality Impact Assessment – Kent

Water Quality Impact Assessment – Kent

Southwest Environmental Limited wear commissioned by a client from the Midlands, to undertake a Water Quality Impact Assessment in Kent. The assessment was for a proposed activity in a water body, where the water quality of said water body was very important to various stakeholders.

Luckily there was pre-existing monitoring data available from a pre-existing site which was utilised to form a baseline study.

The main risk from the activity was judged to be biological contamination of the water body. However, all the potentially impacted stakeholders would like not be affected owing to treatment of the water prior to use that would eliminate the biological contamination.

E Coli – A common Marker for Coliforms

The Water Quality Impact Assessment also identified that the baseline levels of pathogens within the water body as existing were relatively high, this was likely to introduction for farm land and water fowl. As the levels of these pathogens in baseline sample data fluctuated according to rainfall, which in the case of farm land / manure at least would indicate run-off as a source.