1.
Global _____ caused by greenhouse gases.
2.
Long-term shifts in temperature and weather.
3.
Greenhouse gases act like this around Earth.
4.
Potent greenhouse gas from agriculture.
5.
Nitrogen _____ released by natural gas exhaust.
6.
Accidental release of oil into water bodies.
7.
Level of this decreases in water during oil spills.
8.
Toxic metal found in biomass ash.
9.
Another toxic metal in burned biomass ash.
10.
Population severely impacted by hydropower dams.
11.
Wildlife often colliding with wind turbine blades.
12.
Another animal threatened by wind turbines.
13.
Type of pollution produced by windmills.
14.
Visual pollutant from burning firewood.
15.
Element in coal causing respiratory illness.
