EVERYDAY SCIENCE

Detailed explanation-1: -Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere.

Detailed explanation-2: -Atmospheric carbon dioxide comes from two primary sources-natural and human activities. Natural sources of carbon dioxide include most animals, which exhale carbon dioxide as a waste product.

Detailed explanation-3: -Photosynthesis removes carbon dioxide naturally-and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.

Detailed explanation-4: -Cellular Respiration, burning coal, wood, gasoline, turn the Carbon-based molecules back into Carbon Dioxide and water. These Oxidation reactions return the Carbon Dioxide to the atmosphere.