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What are the negative effects of using chemicals?

What are the negative effects of using chemicals? Chemicals are used for different experiments in chemistry. But they can be harmful to humans and the environment when they are not properly used. i) Chemicals are used to keep fish and meat fresh and ripen fruits which is harmful to health. ii) Preservatives are used to preserve different food products which are risky for health. iii) Excessive use of chemical fertilizer harms plants. iv) Different harmful substances enter our bodies through blood by using artificial cosmetics, colors, etc. You may like What is Electrocardiograph? What is biological currency? What is activation energy? What is rate of reaction? What is green chemistry?
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Tooth-Brushing

Tooth-Brushing

First, wet the toothbrush and put some toothpaste with fluoride in it on the toothbrush. Then, we brush the teeth vigorously from side to side for quite a while. At the same, time we make sure that the insides of the teeth are thoroughly cleaned. 

Finally, we rinse several time the toothpaste foam and the food debris out of the mouth.

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Finance and Business Finance

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Main components of computer systems

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Biodiversity

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When you open the gas cylinder used for cooking, which action takes place first diffusion or effusion?

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