| A | B |
|---|
| deforestation | clearing large areas of forest |
| development | improving the standard of living |
| greenhouse effect | extra carbon dioxide and other gases warm up the world |
| leaching | nutrients seep through the soil |
| sustainable forestry | planting at least the same number of trees as are cut down |
| national parks | areas of nature that are hopefully protected from development |
| pollution | damage to the environment |
| sources of pollution | farming, industry, housing and transport |
| overfishing | catching too many fish so that the numbers decline |
| quota | a limit |
| Common Fisheries Policy | what the EU hopes will reduce overfishing |
| subsistence farming | growing only enough for yourself and your family, with very little left over for selling |
| soil erosion | when soil is washed or blown away |
| desertification | when farming land is turned into a desert like condition |
| overcropping | trying to grow too many crops on the land |
| overgrazing | keeping too many animals on your land |
| irrigation | putting extra water on farmland |
| green revolution | increased food production due to fertilisers, pesticides, irrigation and land reform |
| ozone layer | part of the atmosphere that cuts out much of the harmful radiation from the sun |
| global warming | the slow increase in world temperature caused by the greenhouse effect |
