Battle for the Biosphere 1.5 / 5 based on 2 ratings ? GeographyEcosystemsGCSEAll boards Created by: MattCreated on: 30-01-13 10:07 Two human causes of desertification are... Over grazing and over population 1 of 6 What country emits the most CO2 each year? China 2 of 6 What big country didn't sign the Kyoto agreement? United States of America 3 of 6 When did the UK's National Parks first open? 1800 4 of 6 What is the process called when lots of people walk in the smae bit of grass and kill it? Trampling 5 of 6 What is a good way to find out how much litter is in an area? Little survey 6 of 6
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