كويزات ستيب عايد الرسمية: post #4948 — TG.ME

1) Air is the ocean we breathe. It supplies us with oxygen which is essential for our bodies. Air is made up of a mixture of nitrogen, Oxygen, water vapor and inert gases. Human activities release substances into the air and some of these can cause problems for humans, Plants and animals. These Problems are usually referred to as air pollution.

August 29, 2026 996 1