30 terrifying before and after images of climate change

PHOTOS: Before and after climate change



For thirty years, NASA has used satellite-based imagery and temperature data to study climate change.



Click through to see before and after images of climate change. PHOTOS: Before and after climate change



For thirty years, NASA has used satellite-based imagery and temperature data to study climate change.



Click through to see before and after images of climate change. Image 1 of / 48 Caption Close 30 terrifying before and after images of climate change 1 / 48 Back to Gallery

The first-ever March for Science is taking place in hundreds of cities across the country, rallying against what many see as an emerging disregard for the study of the natural world and the answers it provides.

The marches are taking place on Earth Day, no coincidence given the fact that President Donald Trump has taken a radically different stance on climate change than his predecessor.

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Most notably, Trump has called climate change a Chinese hoax, appointed a skeptic of global warming to head the Environmental Protection Agency and pulled the U.S. out of an international agreement to curb climate change called the Paris Climate Accords.

In January, Dr. Rush Holt, the chief executive of the American Association for the Advancement of Science criticized Trump and said denying man-made climate change was "like disputing gravity."

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Today, one doesn't have to pour through spreadsheets or look at scientific models to understand that climate change is occurring throughout the world. With the help of NASA, looking at two photos back to back is more than convincing.

Click through to see 30 before and after images of climate change.