Have you ever wondered why it is so cold outside that you wish it can warm up or get hot?
Well, let me tell you the scientific secret to this question.
The reason why we feel so much cold air in the fall and winter
is what you call Greenhouse gases.
Greenhouse gases are gases in Earth's atmosphere that trap the heat from entering the planet.
They let sunlight pass through the atmosphere, but they prevent the heat that the sunlight brings from leaving the atmosphere cold.
The main greenhouse gases are Water vapor. Carbon dioxide.
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