A cookie is a crumb of data that a website puts on your computer to remember your behaviour and
personalise your online experience. There are different types of cookie that track different types of activity.
CO2 is the main culprit behind the greenhouse effect that threatens climate change.
Through the use of fossil fuel, motor vehicles release large amounts of CO2 into
Biofuels help reduce CO2 emissions as the plants used to create them absorb the
CO2 in the atmosphere through photosynthesis.