Carbon dioxide is a colorless gas containing one carbon and two oxygen atoms. It makes up only 0.04% of Earth's atmosphere. Plants use it for photosynthesis, but it's also a greenhouse gas
Greenhouse effect warms planet by trapping heat from sun. Sunlight reaches Earth, 30% reflected back into space. Atmospheric gases absorb heat, causing planet to warm
Human activities have caused most of the past century's warming. Greenhouse gas levels are highest in 800,000 years. Climate change includes rising temperatures and extreme weather events
Greenhouse gases trap Sun's heat in atmosphere, keeping Earth habitable. Without greenhouse gases, Earth would be -20°C. Greenhouse gases absorb infrared radiation, warming Earth's surface
Greenhouse effect traps solar radiation in atmosphere, raising Earth's temperature. Human activities like fossil fuel burning and deforestation worsen the effect. Industrial Revolution increased CO2 in atmosphere by 30% by end of 20th century
Greenhouse gases trap heat in the atmosphere, causing global warming. Nitrogen and sulfur gases released by human-made objects accumulate in the air. The ozone layer depletion exposes the earth to harmful solar radiation