Environment

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Across
  1. 3. A colourless, odourless reactive gas and the life-supporting component of the air.
  2. 5. It is the problem caused by increased quantities of gases such as carbon dioxide in the air. These gases trap the heat from the sun causing an increase in the Earth's temperature.
  3. 6. The production and discharge of something, especially gas or radiation.
  4. 7. The presence in the environment of a substance which has harmful or poisonous effects.
  5. 8. Particles with diameters of less than 10 micron, e.g. soot from diesel vehicles or incinerators.
Down
  1. 1. The envelope of gases surrounding the earth or another planet.
  2. 2. It is a place where rubbish is left, for example on open ground outside a town.
  3. 4. A gradual increase in the overall temperature of the earth's atmosphere, generally attributed to the greenhouse gases.