People are driving more cars, burning more fuel, using more water, eating more food, making more garbage, and (4) __________ more things in factories than ever before.

Complete each space with one of the words given below. Make changes if necessary.

farm     and     on     probable      product     so      into

People are driving more cars, burning more fuel, using more water, eating more food, making more garbage, and (4) __________ more things in factories than ever before.