Give the source and ill-effects of chlorofluro carbons.

What is ill effect of chloro-flioro carbons?

Give the source and ill-effects of carbon monoxide.

Enlist the sources and ill-effects of carbon monoxide.

Give the source of caffeine.

Give the source of cocaine.

Give the ill-effects of alcohol on cerebellum.

Define opioids. Give their source and effects. Why is heroin called most dangerous drug?

Explain sources and biological effects of four categories of drugs.

What is soil erosion? Write the causes and ill effects of soil erosion. How will you prevent the soil erosion?