2024-09-25 00:00:00 Air Quality Index (AQI) is increasing day by day and the impact is affecting the climate a lot. The change in the weather condition has worsened the air quality. • Air is the Earth's atmosphere. The air around us is a mixture of many gases and dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has no color or smell. It has mass and weight because it is matter. The weight of air creates atmospheric pressure. There is no air in outer space. • Air is a mixture of about 78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide, and very small amounts of other gases. • Air can be polluted by some gases (such as carbon monoxide), smoke, and ash. This air pollution causes various problems including smog, acid rain, and global warming. It can damage people's health.