Environment

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Across
  1. 2. warming a gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space
  2. 3. the number and types of plants and animals that exist in a particular area or in the world generally, or the problem of protecting this
  3. 4. the state of an advanced industrial society in which a lot of goods are bought and sold
  4. 6. the cutting down of trees in a large area, or the destruction of forests by people
Down
  1. 1. damage caused to water, air, etc. by harmful substances or waste
  2. 5. the process of collecting and changing old paper, glass, plastic, etc. so that it can be used again