Air pollution is a severe environmental problem that causes the death of millions of people each year. Which is the most likely cause? a. Human-induced causes b. The sun is getting closer to the Earth and trapping pollution at the surface. c. Earth’s rotating axis has moved creating a greater amount of ozone. d. Carbon monoxide numbers have replaced carbon dioxide at the Earth’s surface. e. All of the above

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

c) up

hope this

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic