Cities across the nation took part in March for Science

Tens of thousands of people sent a message to Donald Trump on Earth Day, calling his policies destructive for the environment.

Major cities across the nation took part in a 'March for Science' during Earth Day.

Some of the biggest rallies were held in Washington D.C., Chicago, and in New York.

They traded classrooms and laboratories for the streets of New York. A demonstration led by scientists and researchers called out what they said was skepticism from the Trump Administration on climate change and their proposed federal cuts to research.

They have studied the facts and reviewed all the evidence.

For many in the scientific community, the conclusion is clear.

They marched down Central Park West, past the Trump International Hotel by the tens of thousands.

Organizers said the goal of the march is political, but not partisan—it’s to promote the importance of science.  

"What could affect us in the future could be pretty horrible. That's why you have to educate people. So we can make changes,” said one student who marched.

While the president did tweet on this Earth Day, his administration is "committed to preserving the natural beauty of our nation."

Critics said his actions don’t reflect that, including the dismantling of Obama era environmental rules that were aimed at restricting greenhouse gas emissions from coal power plants and other large contributors of carbon dioxide emissions.

"They're denying reality for economic and political reasons that make no sense,” said another marcher.

The White House also proposed budget cuts to environmental and science based agencies, which is a concerning approach according to Ellen Futter, President of the American Museum of Natural History

"So many of the most important issues of the day- Climate change and human health just to name 2 specific ones, and right now, science is under some threat,” said Futter.

Dr. Jacob Trevnio, Nano-Science researcher at the City University of New York, was among the marchers.

“It's frustrating for us. It’s our job to educate everyone. We need to continue educating our politicians and the general public,” said Trevnio.

It’s a shared hypothesis that staying visible will make a difference.