From less traffic to more plastic, how the coronavirus shut-down has impacted Pittsburgh.
COVID-19 cost jobs, closed businesses and limited travel. But the economic ruin has also led to record low levels of pollution and huge reductions in climate change emissions globally.
As coronavirus restrictions closed businesses and reduced road traffic during much of March and April, some of the country's most polluted cities experienced better air quality.
A lot has happened since the Allegheny County Health Department finalized a settlement agreement with U.S. Steel over ongoing emissions issues at its Mon Valley Works this past summer.
Pittsburghers old enough to remember the first Earth Day in 1970 would agree with the assertion in the April 27 letter "Natural Gas's Positive Effect on Our Air" that the air looks cleaner now than it did before.
The recent emphasis on public health and respiratory diseases may have people paying more attention to unhealthy air.
People living in and near Pittsburgh are at greater risk in the COVID-19 pandemic because of the poor air quality.
U.S. Steel is delaying construction for its $1 billion project at the Mon Valley Works, part of an effort to secure the Pittsburgh steelmaker's long-term future as COVID-19 disrupts oil and gas markets around the world.
Pittsburgh — The American Iron and Steel Institute urged the Trump administration Wednesday to identify the steel manufacturing sector and its workers as "essential" in directives responding to the coronavirus pandemic.
The Pittsburgh Post-Gazette spoke with Allegheny County councilperson Bethany Hallam about how she defines "progressive," the Clairton Coke Work's environmental impact and the Democratic presidential primary.
Some Pennsylvania environmental groups are dissatisfied with an agreement that the Allegheny County Health Department and U.S. Steel finalized earlier this week.
As we celebrate a World Bicycle Day like no other, can the U.S. keep the momentum and attention the coronavirus pandemic has brought to bicycling?
Twenty-one species molt from brown to white to survive the winter season. But climate change has created a mismatch between their snowy camouflage and surroundings.