Kell, S.P.; Knüpffer, H.; Jury, S.L.; Ford-Lloyd, B.V.; and Maxted, N., 2008. 'Crops and Wild Relatives of the Euro‑Mediterranean Region: Making and using a conservation catalogue', in Crop Wild Relatives Conservation and Use, Maxted, N. et al. (eds).
On very hot days use public transport rather than your car.
Car exhaust emissions react with sunlight and heat to cause polluting gases such as tropospheric ozone. This is the main ingredient of poor air quality and photo-chemical smog, which can cause breathing difficulties. To find out the level of ozone pollution across Europe, go to EEA's Live Ozone Map.
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