Across
- 3. It may be written by professional science journalists or by scientists themselves.
- 4. harder to control because they have different ways of synthesizing and the formation are not well understood.
- 5. ________________were chosen for monitoring to ensure habitat conditions are stable.
- 8. Car emission chemicals building up in birds and other animals.
- 9. When sunlight hits these chemicals, they form airborne particles and ground-level ozone.
Down
- 1. caused by the burning of fossil fuels and the using of chemicals in the home.
- 2. Excess fertilizers, herbicides and insecticides from agricultural lands and residential areas are all examples of
- 3. Pollution is often classed as____________ or nonpoint source pollution.
- 6. It is toxic to animals and is known to accumulate in the tissues.
- 7. I want a _______ free alternative to a traditional oil based eggshell.