Md Jahid Hassan

what Secretary General of the United Nations.

293 Hits Md Jahid Hassan Feb 25, 2022, 4:50 PM

The Secretary-General of the United Nations is the head of the United Nations Secretariat. He also serves as the chief spokesman for the United Nations. The United Nations was established in 1945. Its highest office is the Secretary General.

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What is environmental pollution

276 Hits Md Jahid Hassan Feb 25, 2022, 3:41 PM

Pollution is the unwanted change in the physical, chemical and biological properties of the environment that harms the life of...