Question

why is carbon dioxide is called a “greenhouse" gas? what is the use of carbon dioxide in the air?​

Answer 1

Greenhouse gases (GHG) include carbon dioxide, water vapor, methane, ozone, nitrous oxide and fluorinated gases. These molecules in our atmosphere are called greenhouse gases because they absorb heat. ... Thus, greenhouse gases trap heat within the surface-troposphere system. This is called the greenhouse effect.

Answer 2

Answer:

Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. ... Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. Without it, our planet would be inhospitably cold.