Environmental Impacts UK

We will lok at impacts of food production on the environment, the land, air and water. While we focus of its impact on 'global warming', which we can see has increased dramtically in last 40 years, there are the complex impacts on 'climate change', more difficult to predict. The warming brings about uneven alterations in the various air and water currents which causes 'climate change'.

Despite the massive contribution of farming to UK's 'arbon footprint', there is nowhere near the same discussion about 'green food' as there is about 'green energy, or 'food security' as much as 'energy security', let alone any talk about 'green jobs' in the food and farm sector. Hopefully this site encourages that conversation.

Let's look at the environmental impacts of food production here in UK. Here we go much further than seeing environmental impacts as 'carbon footprint'. Life is much more than a lump pf carbon. Remember what the Royal Society Report said - that there is a disproportionate environmental impact of our food consumption occurring abroad - 70% of the land we use is abroad, 2/3 GHGs produced are abroad, - and then there is all the water used abroad to produce our food. See Worldwide for more

The government says the agricultural sector emits: "12% of total GHG emissions in the UK, 70% of total nitrous oxide emissions, 49% of total methane emissions and 2% of total carbon dioxide emissions

Land

Agriculture accounts for 69% of land use in the UK. Our food production relies on ecosystem services linked to the land and nature, including healthy soils, nutrient cycling, pollination and water regulation. In 2022, the ONS estimated the value of the annual flow of ecosystem services to be more than £37bn, with an asset value of £1.3tn

The main environmental damage to land in the UK from farming is soil degradation. This encompasses the loss of essential organic matter, widespread soil compaction, and severe topsoil erosion. It reduces land fertility and drives pollution into surrounding waterways. More on Soil and Global Warming, and Climate Change.

The majority of this erosion occurs with silts and sands, especially on arable and horticultural land, where mean per hectare erosion rates were also highest. In the UK, approximately 2.2 million tonnes of topsoil are eroded annually. As you can see from the satellite photo of Britain after rainfall, most of that is light-coloured soil going into the North Sea, coming from our best Land (Grades 1&2). Darker soil from the moors areas in West goes into the Irish Sea .

Air

The main Greenhouse Gases (GHGs) are carbon dioxide, methane and nitrous oxides, all produced by farming during food production. We concentrate on the farming side, although there is the small matter of manufacturing, distibution and serving up.

Carbon Dioxide CO2

Manufacturing N-fertiliser takes massive amouts of energy throught the Haber-Bosch process. One ton of nitrogen-based (nitrate) fertiliser produces between 1.5 and 2.6 tonnes of carbon dioxide equivalent CO2}e\. About 40% of UK N-fertiliser is made here, while 60% imported from Poland and Lithuania. 1200Kt urea are imported, particularly now from Egypt. Ee used to use about 1 million tonnes/yr but that has dropped to around 850k. So that amounts to say 2 million tons of CO2

How much would it cost, in carbon credits, to 'offset' the N-fertiliser production?

To buy out the carbon footprint of the UK’s annual nitrogen fertiliser PRODUCTION, it would cost between £8.7 million on the low end of the voluntary market and up to £132 million if using premium, high-integrity technology credits.

If this were managed through the compliance-driven UK Emissions Trading Scheme (UK ETS), the cost would settle at approximately £86 million.

Methane

Methane has 80X GHG potential than CO2, but this drops back after 50 -100 years or so to 20-30X, because it is not as stable. 40% methane is naturally produced, the rest by us - 40% agriculture (80% livestock, rice 20%), 35 fossil fuels and 20% waste. Many people see 'methane belching from cows' as the main aerial impact of food production. Cows feeding on grass, belch out methane which is slowly attacked by 'hydroxy radicals' produced when sunlight hits water. After 12 years, the herd stops causing additional global warming but still causes GW. Indoors, the cows eat less fibre and put on weight faster, but eat a lot of imported grain (1.%b yr in maize & soy) which needs to be factored in.

Methane from ruminants makes up about 56% of total UK agricultural greenhouse gases, and roughly 5-6% of the UK’s total net emissions across all industries combined.

Where have all the cows gone? Battery Cows

How much in carbon credits to offset UK ruminants?

To "offset" GHG of all UK ruminant livestock (cattle and sheep)—which totals roughly 23-24 million tonnes* of CO2e annually—the cost would be (ETS) 1.5b give or take few thousand.

*International reporting standards include methane from enteric fermentation in their calculations, despite it being relatively short-lived and part of natural cycles.

Nitrous Oxides

The application of N-fertilisers creates significant amounts of nitrous oxides released from the soil. This greenhouse gas is nearly 300 X more potent than carbon dioxide. Applying 1 tonne of a commercial fertiliser , such as Ammonium Nitrate, with 34% N by weight, releases approx. 5.3 kg of NO2. There is an IPCC way of measuring, but actually the release is much more variable depending on soil, climate and water. There is also the matter of atmospheric nitrous oxides being taken in and released. The direct nitrous oxide NOx emissions equate to approximately 4 - 4.5 million tonnes of CO2e per year.

How much would it cost in carbon credits to offset NOx emissions

Official allowances traded on the UK Emissions Trading Scheme (UK ETS). While agriculture is not currently forced to buy these, they are the baseline benchmark for the UK.

Official 2026 value: £49.4 per tonne

Total estimated cost: £197.6 million to £222.3 million

Water

Over the last 25 years, the UK has not experienced systemic, country-wide agricultural droughts, but the sector has faced severe regional water shortages about 6 to 8 times. Severe dry spells, exceptionally hot summers, and restrictions on farm irrigation occurred notably in 2006, 2011–2012, 2018, 2020, 2022, 2023, and 2025.

40% of our inland water bodies are impacted by pollution from agriculture and rural areas.

But we do use a lot of other peoples' water - see 'virtual' water.

Virtual Water

Virtual water (also known as embodied or embedded water) is the total volume of freshwater required to produce a product or service, from the beginning of its supply chain to the final consumer. It isn’t the water physically present in the item, but the "hidden" water consumed during its growth, manufacturing, and transportation. The concept of 'virtual' water was creted by Tony Allan, then Prof at Kings College. He was an enormous help to me when designing the Regenerative Food, Farming and Entreprise Masters degree approved by Plymouth University

The UK has experienced a noticeable increase in both the frequency and severity of extreme weather events, including floods and wildfires, over the last 25 years. A warmer atmosphere holds more moisture, which drives heavier rainfall, while hot and dry summers fuel record-breaking wildfire seasons . The state of the land interacts with the water and air currents, and where the soil is less healthy, the impacts can be greater.

Let's have a look at how the public and private sector have responded to these environmental impacts. UK Responses

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