Pollution

2. Equipment used to remove suspended particles from gaseous effluents by attracting them to electrically charged wires or plates.
7. A material that can cause changes in DNA structure.
9. A substance or energy form that can cause cancer.
11. The prediction of the routes that an effluent will take in the environment, to assess pollution
12. A method of reducing NOx emissions e.g. from coal-fired powered power stations.
14. A situation in the troposphere where the temperature is lower than normal so that relatively warm air lies above cold air.
16. A widely used group of insecticides. They have been linked with the deaths of bees, especially when they act synergistically with some fungicides.

1. A method of reducing the temperature of effluent water to reduce thermal pollution and deoxygenation.
3. A wall that surrounds a tank which would contain the contents if the tank leaked or burst.
4. A measure of pollution based on the presence, abundance and state of health of selected living organisms e.g. lichens for acid rain
5. Cleaning up a contaminated site using living organisms such as bacteria that chemically degrade the pollutants
6. The increase in concentration of a substance in living tissue as it is absorbed and stored faster than is broken down and excreted.
8. Relating to ovaries and testes.
10. A method of detecting mineral deposits based on their magnetism.
13. A measure of the rate at which a material breaks down and therefore the length of time it remains.
15. The name given to events when the wind and ocean currents in the equatorial Pacific Ocean slow significantly or reverse.