Why was it important to establish the clean air act? check all that apply?

emphasize cost-effective methods to protect the air

encourage people to study the effects of dirty air on human health

determine ways to reduce the number of premature deaths per year

create a regulation that makes any activities that pollute the air illegal

make sure that no government activities polluted the local atmosphere

What type of limiting factor affects a large population more then it affects a small population

What claim did thorne make? what evidence supported his claim?

Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to canadian breeding grounds in the spring. as global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources how are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring? o a. populations will go extinct since the warblers will stop migrating to breeding grounds. b. populations will be unaffected since most species can quickly adapt to effects of climate change. c. populations will increase since warmer temperatures are generally beneficial to survival, d. populations will decline since individuals will be less likely to successfully reproduce, reset next