Why was it important to establish the Clean Air Act? Select three options.

1) emphasize cost-effective methods to protect the air
2) encourage people to study the effects of dirty air on human health
3) determine ways to reduce the number of premature deaths per year
4) create a regulation that makes any activities that pollute the air illegal
5) make sure that no government activities polluted the local atmosphere

The measure of the angles supplement is 30 more than four times that of its complement. find the measure of the angle described

Spider crabs live in the shallow regions of the ocean floor. algae tend to grow on the surface of spider crabs. the algae provide the crabs protection from predators by camouflaging them. the spider crabs give the algae shelter. what does this description suggest? 1. the algae are parasites of the spider crabs. 2. the algae and the spider crabs have a mutualistic relationship. 3. the spider crabs are commensals, and the algae are parasites. 4. the spider crabs benefit from the algae living on them. 5. the spider crabs are parasites of the algae.

Winds are formed from the sun's uneven heating of the earth's atmosphere. the wind patterns are altered by bodies of water, different landforms, and plant cover. because of this, the wind is considered a form of