The chemist identified the blue powder as copper sulphate.

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Sunscreen protects skin from damage by absorbing harmful UV rays.

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Kelly found the fumes from the hair dye made her nose itch and her eyes water.

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DDT is a chemical called dicholoro-diphenyl-trichloroethane.

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DDT was created around WWII to kill mosquitoes that were spreading diseases such as malaria.

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People observed that eagle egg shells were weak and broke before young birds could be born due to the harmful use of DDT.

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Experts have found that DDT harms the reproductive and immune systems of animals.

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Because of the use of DDT and its harmful effects on eagle eggshells, bird populations started to drop.

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Even though DDT is used, malaria continues to kill nearly 1.3 million people each year.

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