“Our Big Day Today,” read the subject line of an email sent to Environmental Protection Agency employees by a top aide to EPA Administrator Scott Pruitt.

Those four words were referring to March 28, when President Donald Trump paid a visit to EPA headquarters to sign an executive order to dismantle at least six Obama-era environmental regulations.

By forcing the order, Trump authorized a review of the Clean Power Plan—which works to cut carbon pollution from power plants and accelerate America’s path toward cleaner and lower-polluting energy. It also rescinded a suspension of coal leases on federal lands and Obama’s 2013 executive order that required the government to prepare for the effects of climate change.

Throughout his bid for the presidency, Trump made it clear climate change was not a priority and vowed to reverse Obama’s environmental legacies from Washington. He fulfilled his promise on Tuesday, and it is an ignorant and alarming move that denies the science that 97 percent of scientists support.

Trump said Obama’s environmental commitments restrict American jobs by forcing companies to invest in limiting pollution and other environmental controls. The Clean Power Plan also would have closed hundreds of coal power plants, frozen construction of new plants and replaced them with wind and solar plants.

“The previous administration devalued workers by their policies,” the White House official said. “We are saying we can do both. We can protect the environment and provide people with work.”

It is clear Trump’s administration puts American coal industry jobs above any focus on climate change, since the Clean Power Plan was helping Obama carry out his promise of cutting the U.S.’s carbon emissions by 26 percent by 2025.

American jobs are always important, but America is the world’s second leading producer of greenhouse gases. Trump’s move to put climate change near the bottom of his to-do list is wrong and irresponsible.

“(Climate change) is an issue that deserves attention,” the White House official said. “But I think the president has been very clear that he is not going to pursue climate change policies that put the U.S. economy at risk. It is very simple.”

It may seem simple, but Trump’s executive order contradicts itself.

Trump’s administration says clean water and clean air are their main priorities, but by attempting to change the Clean Power Plan and promoting coal energy, water and air are not protected. “Clean Power” implies clean water and air.

Trump has said he plans to “end the war on coal,” but the clean air and water acts require the EPA to publish a list of “stationary sources” of air pollution—one of the biggest offenders being coal power plants.

If Trump wants to completely eliminate the Clean Power Plan, he would be violating the Clean Air Act and the Clean Water Act because the Supreme Court declares carbon emissions as a source of air pollution.

“Gutting the Clean Power Plan is a colossal mistake and defies science itself,” California Gov. Jerry Brown (D) said. “Erasing climate change may take place in Donald Trump’s mind, but nowhere else.”

Brown and California were part of a challenge filed on April 5 against Trump’s efforts. Sixteen other states were part of the coalition. The states said the administration has a legal duty to regulate emissions of greenhouse gases.

Trump also rescinded Obama’s climate change preparation order, but not an order that prevents ocean acidification, which is caused by rising carbon dioxide levels—the main contributor to climate change.

If the president thinks he’s doing the right thing for the country, he could at least make sense. Trump’s move takes a step backward for climate change, and the planet can’t afford to.