Human

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What is photochemical smog?
Environment

What is photochemical smog?

Photochemical smog is a fog that is not caused by air humidity. It is a form of white smoke that seriously affects people's vision and health.

February 9, 2020
Why say natural resources are limited?
Environment

Why say natural resources are limited?

Natural resources mean the components of nature that are used by humans in certain forms to exploit and apply to life, necessary materials for society.

January 27, 2020