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What is Global Warming?
"Global warming is an increase in the average temperature of the earth's surface over time. This rise results from the ""greenhouse effect,"" in which gases such as carbon dioxide trap heat within the earth's atmosphere. The climbing temperatures could"... More »
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Source: www.ehow.com

en.wikipedia.org/wiki/Global_warming

Global warming, also referred to as climate change, is the observed century- scale rise in the average temperature of the Earth's climate system and its related  ...

www.nationalgeographic.com/environment/global-warming/global-warming-overview

We call the result global warming, but it is causing a set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place. As the ...

www.nrdc.org/stories/global-warming-101

Mar 11, 2016 ... A: Here's a simple definition of global warming. (And yes, it's really happening.) Over the past 50 years, the average global temperature has ...

climate.nasa.gov/evidence

Vital Signs of the Planet: Global Climate Change and Global Warming. How do we know it's happening? Here's the evidence.

climate.nasa.gov/causes

Vital Signs of the Planet: Global Climate Change and Global Warming. What is the “greenhouse effect”? What is causing it? Are humans to blame? What does ...

www.ucsusa.org/our-work/global-warming/science-and-impacts/global-warming-impacts

An overview of the impacts of global warming, including sea level rise, more frequent and severe heat waves, increasing wildfire risks, and more. Many are ...

www.ucsusa.org/our-work/global-warming/science-and-impacts/global-warming-science

The science is clear. Global warming is happening. We are the primary cause. Learn why an overwhelming majority of climate scientists agree that human ...

whatsyourimpact.org/global-warming

Global warming is the current increase in temperature of the Earth's surface (both land and water) as well as it's atmosphere. Global warming is caused by the ...

www.c2es.org/science-impacts/basics

Global warming basics behind the science of climate change, including facts, figures, greenhouse gas emissions data, cause and effects.