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Causes | Facts – Climate Change: Vital Signs of the Planet The Greenhouse Effect Increasing Greenhouses Gases Are Warming the Planet Scientists attribute the global warming trend observed since the mid-20 th century to the human expansion of the "greenhouse effect" 1 — warming that results when the atmosphere traps heat radiating from Earth toward space Life on Earth depends on energy coming from
Methane - Climate Change: Vital Signs of the Planet Methane (CH 4) is a powerful greenhouse gas, and is the second-largest contributor to climate warming after carbon dioxide (CO 2) A molecule of methane traps more heat than a molecule of CO 2, but methane has a relatively short lifespan of 7 to 12 years in the atmosphere, while CO 2 can persist for hundreds of years or more
Carbon Dioxide - Climate Change: Vital Signs of the Planet Carbon dioxide (CO 2) is an important heat-trapping gas, also known as a greenhouse gas, that comes from the extraction and burning of fossil fuels (such as coal, oil, and natural gas), from wildfires, and natural processes like volcanic eruptions
What Is Climate Change? | Facts - Climate Change: Vital Signs of the Planet Changes observed in Earth’s climate since the mid-20th century are driven by human activities, particularly fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth’s atmosphere, raising Earth’s average surface temperature
Reducing Emissions to Lessen Climate Change Would Yield Dramatic Health . . . Air quality improvements resulting from a worldwide reduction in greenhouse gas emissions would benefit human health and prevent economic losses, according to new research by scientists from NASA, Duke University, and Columbia University
Carbon dioxide controls Earths temperature – Climate Change: Vital . . . Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide
Tracking Earths most abundant greenhouse gas In its vapor phase, water, like carbon dioxide, traps and radiates heat back toward our planet As global temperatures rise, atmospheric humidity also increases, boosting the greenhouse effect