Explain how too much carbon dioxide in the atmosphere causes these changes.

Carbon dioxide becomes a poisonous gas when there is too much of it in the air you breathe. Besides the effects it can have on the planet and the atmosphere, carbon dioxide poisoning can lead to central nervous system damage and respiratory deterioration in humans and other breathing creatures.

Explanation:

The major threat from increased CO2 is the greenhouse effect. As a greenhouse gas, excessive CO2 creates a cover that traps the sun's heat energy in the atmospheric bubble, warming the planet and the oceans.

Explanation:

im smart