What is global warming?

Science

Carbon dioxide is an example of a greenhouse gas.

A substance that can be burned to release energy

A substance that is harmful to the environment

A substance that is produced in a chemical reaction

A substance that is used in a chemical reaction

The amount of carbon dioxide in the air is decreasing

The amount of carbon dioxide in the air is increasing

The amount of oxygen in the air is decreasing

The amount of oxygen in the air is increasing

How is human activity contributing to global warming?

A synthetic material is a material made by humans.

What has happened to the global temperature since the industrial revolution?