Environment

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Across
  1. 4. A layer in the earth's stratosphere, which absorbs most of the ultraviolet radiation reaching the earth from the sun.
  2. 5. A gradual increase in the overall temperature of the earth's atmosphere.
  3. 7. Energy fuelled in ways that do not use up the earth's natural resources or otherwise harm the environment, especially by avoiding the use of fossil fuels or nuclear power.
Down
  1. 1. An increase in the amount of carbon dioxide and other gases in the atmosphere (= mixture of gases around the earth), that is believed to be the cause of a gradual warming of the surface of the earth.
  2. 2. The action of clearing a wide area of trees.
  3. 3. The presence in the environment of a substance which has harmful or poisonous effects.
  4. 6. Convert waste into reusable material.
  5. 8. Rainfall made so acidic by atmospheric pollution that it causes environmental harm, chiefly to forests and lakes.