Scott Pruitt, the Republican attorney general of Oklahoma, is the incoming president’s pick to lead the Environmental Protection Agency (EPA). He’s also one of the agency’s fiercest critics.

Pruitt’s nomination, which was announced on Wednesday, could help President-elect Donald Trump achieve one of his boldest campaign promises – the near-elimination of an agency whose rules affect many businesses, including those in the glass and fenestration industries.

“We are going to get rid of it (the EPA) in almost every form,” Trump said during the GOP debate in March 2016. “We’re going to have little tidbits left, but we’re going to take a tremendous amount out.”

In the past, Pruitt has taken legal action against the agency he’s been picked to run. As Oklahoma’s attorney general, he has sued the EPA over its power plant regulations. He also took part in a case that claimed the agency has a cozy relationship with environmental groups.

“For too long, the Environmental Protection Agency has spent taxpayer dollars on an out-of-control anti-energy agenda that has destroyed millions of jobs, while also undermining our incredible farmers and many other businesses and industries at every turn,” Trump said in a statement announcing Pruitt’s nomination. “As my EPA administrator … Pruitt … will reverse this trend and restore the EPA’s essential mission of keeping our air and our water clean and safe.”

“We are looking forward to working with the new administrator once the confirmation process is complete,” said Kevin McKenney, director of government affairs for the Window and Door Manufacturers Association (WDMA). “We are optimistic that opportunities to address the regulatory burden currently facing manufacturers will emerge, and WDMA will continue to engage EPA on implementing common-sense solutions.”

A major focus for the fenestration industry is amending the EPA’s controversial Lead: Renovation, Repair and Painting (LRRP) Rule. The LRRP rule requires any renovation work and all door and window replacements that disturb more than six square feet of a pre-1978 home’s interior to follow rigorous and costly work practices.

Additionally, WDMA has criticized the EPA in the past for ignoring the industry’s input on EPA’s Energy Star Version 6.0 specifications for doors, windows and skylights, which went into effect on January 1, 2015.

Ed Brady, chair of the National Association of Home Builders (NAHB) and a developer from Bloomington, Ill., praised the selection of Pruitt.

“NAHB believes in environmental regulations that truly protect the environment,” Brady said in a statement. “However, the EPA has taken on an increasingly activist agenda during the Obama administration, often issuing regulations based on political considerations and failing to go through the proper rulemaking process, as illustrated by its ‘Waters of the U.S.’ rule. Scott Pruitt will restore common sense to the regulatory process by ensuring that federal regulations are based on sound science, do not trample states’ rights and address the economic impact they will have on small businesses.”

Meanwhile, environmental groups expressed outrage over Pruitt’s nomination.

“Having Scott Pruitt in charge of the U.S. Environmental Protection Agency is like putting an arsonist in charge of fighting fires,” the Sierra Club said in a statement.