Chlorofluorocarbons are used in refrigerators, air conditioners, and the manufacture of plastic foams. It may lead to changes in the sea level. It increases the amount of ultra-violet radiation that reaches the earth's surface. It increases the rate of saltwater intrusion into aquifers. It decreases the ph in lakes and streams.
Mechanized agriculture produces greater crop yields.
Mechanized agriculture requires more fossil energy. Mechanized agriculture requires the use of more fertilizers and pesticides.