'Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver.' (2009) 2 Statement on Climate Change from 18 Scientific Associations The following is a partial list of these organizations, along with links to their published statements and a selection of related resources. In addition, most of the leading scientific organizations worldwide have issued public statements endorsing this position. With that said, multiple studies published in peer-reviewed scientific journals 1 show that climate-warming trends over the past century are extremely likely due to human activities.

This effort includes citing multiple peer-reviewed studies from research groups across the world, 1 illustrating the accuracy and consensus of research results (in this case, the scientific consensus on climate change) consistent with NASA’s scientific research portfolio. NASA Global Climate Change presents the state of scientific knowledge about climate change while highlighting the role NASA plays in better understanding our home planet. This is based on over a century of scientific evidence forming the structural backbone of today's civilization. Scientific evidence continues to show that human activities ( primarily the human burning of fossil fuels) have warmed Earth’s surface and its ocean basins, which in turn have continued to impact Earth’s climate. It’s important to remember that scientists always focus on the evidence, not on opinions.

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