Irrigation machinery has the amount of irrigated land in the us. a. doubled b. tripled c. quadrupled d. quintupled

Which of the timelines above accurately represents the order of historical events in canadian history? a. one (1) b. two (2) c. three (3) d. four (4)

Soil is made of air water organic material minerals weathered rock

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.