But I need a different lot of chemicals, and they cost money.

But in other cases, they may have to use less of the chemicals.

Where can I get information about the health effects of chemicals?

Some of these same chemicals play an important role in how you feel pain.

This is the study of the chemicals in living things.

It probably takes a lot of chemicals to do this.

Each is given the title of a chemical or a drug.

More than 50 different kinds of chemicals were used in the schools.

Can anything be done - short of chemicals - to stop them?

I have stopped using any type of chemicals on my hair so now it is all natural.