What do these fossilized forests tell scientists?

D this part of Arizonan use to be much wetter

I took the test and got it right

answer; ////increased water pollution; ///////////////////////

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.