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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 ...
The Greenhouse Effect, Simplified – Climate Change: Vital Signs of the ...
A simplified animation of the greenhouse effect. Credit: NASA/JPL-Caltech (Download en español.)
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.
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.
Scientists assess potential for super greenhouse effect in Earth's ...
Scientists investigate whether continued warming on Earth could cause a super greenhouse effect in tropical regions to “run away” as it might have on Venus.
Agents of global warming - Climate Change: Vital Signs of the Planet
Scientists believe the main driver behind this warming trend is rising levels of man-made greenhouse gases; these gases, which we pump out into the air, act to trap heat radiation near the surface of the Earth that would otherwise be sent back out into space.
Amplified greenhouse effect shifts north's growing seasons
An amplified greenhouse effect is driving the changes, according to Myneni. Increased concentrations of heat-trapping gasses, such as water vapor, carbon dioxide and methane, cause Earth's surface, ocean and lower atmosphere to warm.
Study: Urban Greenery Plays a Surprising Role in Greenhouse Gas ...
A new study tracing the sources of carbon dioxide, the most significant human-generated greenhouse gas, reveals the unexpectedly large influence of vegetation in urban environments.
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