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The Svínafellsjökull glacier in Iceland. Glacial retreat is among the most visible impacts of climate change. Since the early 20th century, with few exceptions, glaciers around the world have been retreating at unprecedented rates.

In this file photo, Mariner East 2 pipeline construction crews work in the backyards of homes on Lisa Drive in West Whiteland Township, Chester County, on May 2, 2018 after sinkholes opened in the area. That caused one of the ME2 project's many delays.
Updated: November 12, 2019 | 9:02 pm

Associated Press: FBI is investigating Wolf administration’s issuing of Mariner East pipeline permits

The Associated Press cites three sources who say FBI agents have interviewed current or former state employees in recent weeks about the Mariner East project and the construction permits.

By Staff

RETRO REPORT on PBS is hosted by artist Masud Olufani and journalist Celeste Headlee.

A statue representing the

Environmental activist Greta Thunberg, of Sweden, addresses the Climate Action Summit in the United Nations General Assembly, at U.N. headquarters, Monday, Sept. 23, 2019.

‘How dare you’: Greta Thunberg rips world leaders at UN for ‘failing’ on climate change

In a speech to open the United Nations Climate Action Summit, the 16-year-old activist told attendees, “You are still not mature enough to tell it like it is. You are failing us, but the young people are starting to understand your betrayal.”

By Staff

Demonstrators gather on the steps of the state capitol in Harrisburg to demand action on climate change on Friday, September 20, 2019.

New report: Countries must triple climate emission cut targets to limit global heating to 2 degrees Celsius

The United in Science report says it is still possible to reduce the gap and keep global heating to a safe level, but it would require an urgent shift in commitments and action.

By Adam Morton, The Guardian

Kayonia Sowell is a 10th grade student at Brashear High School in Pittsburgh.

‘I want to understand’: Pittsburgh teen questions how climate change is taught — or isn’t — in schools

Kayonia Sowell says, “Though everyday weather isn’t climate change, I want to understand how the weather is changing, and what that is going to mean in the future. My future.”

By Kayonia Sowell

Methane leaks throughout the entire process of developing natural gas-- from wells and storage sites, to processing facilities and pipelines.

Q&A: Princeton U. researchers say controlling methane leaks can ‘pay off quickly’ to lessen effects of climate change

Research included areas in western Pennsylvania
By Steven Schultz, Princeton University

Michael Mann, professor of atmospheric science at Penn State

Q&A: Penn State climate scientist Michael Mann on news coverage since ‘Climategate’

The Penn State professor said what he calls a “kinder, gentler form of climate denialism” is “the new climate war… In some ways, it has the veneer of credibility. It seems reasonable to many people. And that makes it, to some extent, even more pernicious.”

By Brendan Fitzgerald, Columbia Journalism Review

Philadelphia students cut class Friday, May 3, 2019 to participate in a rally at Thomas Paine Plaza to protest inaction on climate change issues.

Behind the climate hype: Can models be trusted?

Thousands of scientists are banking on these models as guideposts for the planet’s future. What makes them so sure?

By Amanda Paulson, Christian Science Monitor