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.
Causes of global warming include human activities like deforestation and
burning fossil fuels.
... on Climate Change (IPCC) ... human activities have ...
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 ...
Vital Signs of the Planet: Global Climate Change and Global Warming. ... and
other human activities have increased concentrations of greenhouse gases.
Sep 23, 2015 ... Natural causes alone cannot explain all of these changes. Human activities are
contributing to climate change, primarily by releasing billions of ...
Is Human Activity Primarily Responsible for Global Climate Change? .... Global
warming caused by human-produced greenhouse gases is causing the Arctic ice
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.
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.
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.