PETROLEUM. WE ARE USING UP THE WORLD’S PETROLEUM. WE USE IT IN OUR...

3. Petroleum. We are using up the world’s petroleum. We use it in our cars and to heat our building in winter.

Farmers use petrochemicals to make the soil rich. They use them to kill insects that eat plants. These chemicals

go into rivers and lakes and kill the fish there. Thousands of people also die from these chemicals every year.

Chemicals also go into the air and pollute it. Winds carry this polluted air to other countries and other continents.