Multiple choice

How does Carbon enter the atmosphere as Carbon Dioxide?

  1. Respiration and Combustion

  2. Combustion and Death

  3. Photosynthesis and Animals

  4. Machines and Animals

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon enters the atmosphere as carbon dioxide primarily through respiration (by all living things) and combustion (burning of organic matter or fossil fuels).