The emissions of ozone precursors (NOx, NMVOC, CO and CH4) are each weighted by an ozone formation factor prior to aggregation to represent their respective ozone forming potentials. The relative impact of the combined contribution of NOx, NMVOC, CO and CH4 to ozone formation can be assessed based on their tropospheric ozone forming potentials (TOFP): nitrogen oxides 1.22, non-methane volatile organic compounds 1.0, carbon monoxide 0.11 and methane 0.014.
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Where you can, choose organically farmed fish such as sea bass, salmon and trout.
Non-organic fish uses large quantities of chemicals and antibiotics which can affect other animals in the food chain. It is also worth bearing in mind that to produce a 3 kg farmed salmon, 15 kg of fish are caught in the wild to provide its meal and oil.
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