Some participants also voiced concerns about potential cuts in federal funding for science and research. Others wanted an opportunity to move science out of labs and academia.
"Over The River," which would have suspended six miles of silver fabric over stretches of Colorado's Arkansas River, has faced a lot of opposition.
Wild Earth Guardians alleges the the state's plan violates the Colorado constitution.
President Barack Obama pushed for a more forceful approach in areas like climate change and renewables, but the Trump administration could undo much of his work.
The county's commissioners say that adding large industry, such as oil and gas, would put a strain on natural resources.
- The states have been locked in legal battles over the river's water for the last 15 years.Read more
- The Navajo Nation on Tuesday joined New Mexico in pursuing legal action against the EPA.Read more
The New Jersey artist brings her public art installations to Colorado this week for the Breckenridge International Festival of Arts.