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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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Science Class Eight

Science 
Class Eight

Contents 

Chapter-1: Classification of Animal World

Chapter-2: Growth and Heredity of Living Organism

Chapter-3: Diffusion, Osmosis and Transpiration

Chapter-4: Reproduction in Plants

Chapter-5: Co-ordination and Secration

Chapter-6: The Structure of Atoms

Chapter-7: The Earth and Gravitation

Chapter-8: Chemical Reaction

Chapter-9: Electric Circuits and Current Electricity

Chapter-10: Acid, Base and Salt

Chapter-11: Light

Chapter-12: The Outer Space and Satellites

Chapter-13: Food and Nutrition

Chapter-14: Environment and Ecosystem

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