key term - Carbon Dioxide (CO2)

Definition

Carbon dioxide is a colorless gas naturally present in Earth's atmosphere. It is released through natural processes like respiration and volcanic eruptions but also through human activities such as burning fossil fuels. CO2 is a major greenhouse gas contributing to global warming.

Related terms

Greenhouse Gas:

Gases that absorb and emit radiation within the thermal infrared range, contributing to the greenhouse effect.

Photosynthesis:

The process by which green plants use sunlight, water, and carbon dioxide to produce oxygen and glucose (energy-rich sugar).

Ocean Acidification:

The ongoing decrease in pH levels of seawater due to increased absorption of carbon dioxide from the atmosphere.