If new regulations were passed to prevent environmental issues caused by these smoke stacks, what type of impact would that be?

A. economic
B. geographic
C. political
D. social

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

Which of these fragmental sedimentary rocks would most likely form farthest from the land?

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes.b. it burns more cleanly than crude oil products.c. scientists have developed new ways of extracting it.d. during its extraction, groundwater can be contaminated.