The environment- Revision

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Across
  1. 5. A THICK FOREST WITH TALL TREES IN TROPICAL AREAS WITH A LOT OF RAIN
  2. 6. AN ANIMAL THAT COULD DISAPPEAR BECAUSE THERE ARE VERY FEW OF THEM
  3. 9. the unpleasant and unhealthy smoke and gases that are produced by fires or by things such as chemicals, fuel, or cooking in factories
  4. 11. THE ACT OF CUTTING DOWN TREES IN FORESTS
Down
  1. 1. THE INCREASE IN THE EARTH'S TEMPERATURE CAUSED BY HIGH LEVELS OF CARBON DIOXIDE
  2. 2. A RISE IN THE TEMPERATURE OF THE EARTH'S ATMOSPHERE CAUSED BY INCREASED QUANTITIES OF GASES SUCH AS CARBON DIOXIDE
  3. 3. RUBBISH SUCH AS PAPER, CANS AND BOTTLES LEFT LYING IN AN OPEN OR PUBLIC SPACE
  4. 4. SOMEHTING THAT DECAYS NATURALLY WITHOUT CAUSING POLLUTION
  5. 7. A LONG PERIOD OF TIME WHEN NO RAIN FALLS
  6. 8. SEPARATING RUBBISH SO IT CAN BE USED AGAIN
  7. 10. THE POISONOUS SUBSTANCES THAT ARE MAKING THE LAND, WATER AND AIR DIRTY