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There is strong evidence that human activity is a major cause of global warming.
In a study, models based on man-made emissions of greenhouse gases matched the real world observations almost precisely.

How are humans responsible for global warming? | Environmental ...


Causes of global warming include human activities like deforestation and burning fossil fuels.

How Do We Know that Humans Are the Major Cause of Global ...


... on Climate Change (IPCC) ... human activities have ...

Global Warming is Human Caused - National Wildlife Federation


Scientists have concluded that most of the observed warming is very likely due to the ... Human activity--such as burning fossil fuels--causes more greenhouse ...

Climate Change: Vital Signs of the Planet: Causes - Global Climate ...


Vital Signs of the Planet: Global Climate Change and Global Warming. ... and other human activities have increased concentrations of greenhouse gases.

Science | Climate Change | US EPA


Sep 23, 2015 ... Natural causes alone cannot explain all of these changes. Human activities are contributing to climate change, primarily by releasing billions of ...

Climate Change ProCon.org


Is Human Activity Primarily Responsible for Global Climate Change? .... Global warming caused by human-produced greenhouse gases is causing the Arctic ice  ...

Is Human Activity Primarily Responsible for Global Climate Change ...


Apr 7, 2015 ... "Multiple lines of independent evidence confirm that human activities are the primary cause of the global warming of the past 50 years.

Empirical evidence that humans are causing global warming


Direct observations find that CO2 is rising sharply due to human activity. ... a line of empirical evidence that human CO2 emissions are causing global warming.

How Do Humans Cause Global Warming? | PlanetSave


Feb 2, 2009 ... Humans cause global warming with our unique ability to capture and use .... I think the clear point was which activities cause the warming.

Popular Q&A
Q: Is global warming caused by human activity?
A: Signals that humans are the main factor behind recent global warming are Read More »
Source: www.chacha.com
Q: Is global warming caused by human activity?
A: I wrote this about six months ago, but never posted it. The version I've posted here doesn't have images. A link to an html version with images is here and a PD... Read More »
Source: www.freerepublic.com
Q: Is global warming caused by humans and their activities?
A: This response exemplifies the strong positions taken by both sides of the Global Climate Change Issue. Readers are directed to the Wikipedia articles appended t... Read More »
Source: wiki.answers.com
Q: Is Global Warming Caused by Human Activities?
A: Since 1900, greenhouse gases in the atmosphere have increased by an amount equivalent to about a 50% rise in carbon dioxide alone. This gives us a way to antici... Read More »
Source: www.marshall.org
Q: Anyone belive Global Warming caused by Human Activity?
A: Of course GW is caused by human activity. All hoaxes are! Read More »
Source: answers.yahoo.com