The steel mills and other factories that once made Pittsburgh look like "hell with the lid taken off" all but disappeared over the past generation, and the city has become known as a hub for technology, higher education, energy and health care.
He said under the Paris deal, developed countries agreed to set economy-wide reductions in greenhouse gas emissions while developing countries "should continue enhancing their mitigation efforts" with the aim of achieving economy-wide absolute reductions eventually.
The thing is, the people of Pittsburgh are going green.
In the wake of Trump's decision, Pittsburgh Mayor Bill Peduto reaffirmed his city's commitment to the 2015 Paris accord and called the president's move "reckless" and "unacceptable".
The U.N.is in the city of NY which lit key municipal buildings in green on Thursday in support of Paris. And on Thursday, Ivanka, who had been working behind the scenes to convince President Trump not to put his fingers in his ears and sing la-la-la while the environmental dystopias of our summer reading list build momentum around us, celebrated the holiday Shavuot with her husband and kids as her father tuned up the jazz band to play a jaunty funeral tune for the planet.
"I think the people of Pittsburgh understand that this is a global problem", said Angeli, a 29-year-old digital communications manager. On Thursday, almost 90 mayors said they would uphold its goals.
On Friday, Trump's campaign announced there would be "Pittsburgh, not Paris" rally near the White House.
The U.N. wheels turn slowly and nearly 24 hours after President Trump yanked America away from the Paris Accord the first words, on live TV from a spokesperson.