47 years ago the first Earth Day was celebrated by concerned citizens, students, teachers and college faculty in San Francisco, New York City and around the country.

This was before the formation of the EPA, the Clean Water Act, the Endangered Species Act and a host of other environmental protections in the United States. But now, some think policies and views of the scientific community are in retrograde.

Renewed concern among environmentalists in the wake moves made by the Trump administration have led to protests and demonstrations from coast to coast, notably the planned March for Science planned for Washington, D.C. this Earth Day, April 22, and in 400 other locations nationwide.

In 2012, Donald Trump tweeted: "The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing noncompetitive."

But it's not all about the president.

Rush Holt, head of the American Association for the Advancement of Science, tells the Washington Post scientists have long worried "evidence has been crowded out by ideology and opinion in public debate and policy making."

Because making a change has never mattered more.

Media: WochIt Media

The March for Science's mission statement states "the application of science to policy is not a partisan issue. Anti-science agendas and policies have been advanced by politicians on both sides of the aisle, and they harm everyone — without exception."

Others put more of a point on it, "so far, the Trump administration has shown little, if any, regard for science: I hope the coordinated marches for science will convey the following messages," Dr. LeRoy Hood, president and co-founder of the Institute for Systems Biology, told SeattpPI.com in a recent interview.

"Public funding of science has very broad support in the U.S. and a huge positive impact on the U.S. economy. Continued investments in science will drive innovation, invention and technical leadership."

Take a look at the photos in the above slideshow to see amazing photos of the natural UNESCO World Heritage Sites to see what may be at stake.