MONACA, Pa. (AP) — President Donald Trump sought to take credit Tuesday for the construction of a major manufacturing facility in western Pennsylvania as he tries to reinvigorate supporters in the Rust Belt towns that sent him to the White House in 2016.

Trump visited Shell’s soon-to-be completed Pennsylvania Petrochemicals Complex, which will turn the area’s vast natural gas deposits into plastics. The facility, which critics claim will become the largest air polluter in western Pennsylvania, is being built in an area hungry for investment.

Speaking to a crowd of thousands of workers dressed in fluorescent orange and yellow vests, Trump said “This would have never happened without me and us.” In fact, Shell announced its plans to build the complex in 2012, when President Barack Obama was in office.

He used the official White House event as an opportunity to assail his would-be Democratic rivals, saying, “I don’t think they give a damn about Western Pennsylvania, do you?”

The focus is part of a continued push by the Trump administration to increase the economy’s dependence on fossil fuels in defiance of increasingly urgent warnings about climate change. And it’s an embrace of plastic at a time when the world is sounding alarms over its impact.

“We don’t need it from the Middle East anymore,” Trump said of oil and natural gas, proclaiming the employees “the backbone of this country.”

Trump’s appeals to blue-collar workers helped him win Beaver County, where the plant is located, by more than 18 percentage points in 2016, only to have voters turn to Democrats in 2018’s midterm elections. In one of a series of defeats that led to Republicans’ loss of the House, voters sent Democrat Conor Lamb to Congress after the prosperity promised by Trump’s tax cuts failed to materialize.

Today, Beaver County is still struggling to recover from the shuttering of steel plants in the 1980s that surged the unemployment rate to nearly 30%. Former mill towns like Aliquippa have seen their populations shrink, while Pittsburgh has lured major tech companies like Google and Uber, fueling an economic renaissance in a city that reliably votes Democratic.

Trump claimed that his steel and aluminum tariffs have saved the industries and that they are now “thriving,” exaggerating the recovery of the steel industry, particularly when it comes to jobs, which have largely followed pace with broader economic growth.

Trump took credit for the addition of 600,000 U.S. manufacturing jobs, but Labor Department figures show that roughly 500,000 factory jobs have been added since his presidency started.

The sector has also started to struggle this year as the administration intensified its trade war with China and factory production has declined. Pennsylvania has lost 5,600 manufacturing jobs so far this year, according to the Labor Department.