They use special chemical substance to _________ the growth of crops.A aggravateB acce

Proponents of organic farming claim that using chemical fertilizers and pesticides in farm

Many people are against the use of chemicals to preserve food because.A．chemicals are not

Biologists have ascertained that specialized cells convert chemical energy into mechanical

Farmers use chemicals and fertilizers in order to

Farmers use chemicals and fertilizers in order to

There are strict rules_____the use of chemicals in food