Environment & Science

People who stayed up late Sunday night were treated to an incredible display of the northern lights, which were visible in the Lehigh Valley.

The National Weather Service issued a severe thunderstorm watch for Lehigh, Northampton, Carbon, Monroe and several other eastern Pennsylvania counties.

Take a look at stories throughout the week of which we are most proud, had a profound impact on readers or that you might want to look at again.

Mayors in Allentown, Bethlehem and Easton are coming together to fight against worsening climate change and strengthen sustainability across the region. Two of the three cities have their own climate action plans.

There are plenty of ways to celebrate Earth Day on Saturday, April 22, in the Lehigh Valley.

The first new building on Muhlenberg’s campus in more than a decade, the Fahy Commons for Public Engagement and Innovation, 2400 W. Chew St., opened in January. The 20,000-square-foot, three-floor building cost $13.2 million and is one of the first buildings in the world expected to achieve a rigorous sustainability certification for buildings that give more than they take.

A few strong to severe thunderstorms are possible in the region on Saturday, with the main threat being damaging wind gusts, according to the National Weather Service.

Puerto Rico's electrical grid has been devastated by hurricanes due to worsening climate change. Ruth Santiago, a Bethlehem native, has a solution.

Swarms of non-biting midge flies last week were spotted in Bethlehem. LehighValleyNews.com spoke with Marten Edwards, chair of Muhlenberg College's biology department, to find out more about the insects.

While Monday will bring mostly sunny skies and dry weather to the region, meteorologists are tracking a series of storms that will make for a mostly soggy week in the Lehigh Valley — with a question of wintry weather by week's end.

Pa.'s Department of Environmental Protection gave the company 14 days to come up with a plan of action.

A pattern change known as the "Greenland Block" could introduce cold air — and perhaps wintry weather — into the region by mid-December, meteorologists say. But what is the pattern and why could it bring snow?

Two seafood monitoring groups downgraded Maine lobster's sustainability ratings, prompting Whole Foods to pause purchases. Here's how environmental groups and state leaders are reacting.

Shopping not your thing? #OptOutside and join the movement started by specialty outdoor retailer REI in 2015 as a way to encourage people to reconnect with nature. We've got a list of places to check out across the Lehigh Valley.

Local officials warn residents never to pour fats, oils and grease (FOG), into the sink because it can harden and cause blockages in pipes.

Lafayette Junior Remy Oktay flew a Pipistrel Alpha Electro about 500 feet above Fisher Stadium on Saturday.

Animal response workers cared for up to 5 dogs and a cat at Nitschmann Middle School as they sheltered with their people.

A hot, dry July this year slashed yields for many Lehigh Valley farmers this year, just as prices for fertilizer hit all-time highs. Now, Northampton County is offering help them implement new practices that could let them use less.

Officials offer 6 tips to keep Pa. consumers' energy costs down and keep warm as temperatures drop.

The Lehigh Valley had its first taste of snow on Tuesday, and the National Weather Service says temperatures will run 10 to 15 degrees below normal through the weekend.

The official start of winter comes Wednesday, Dec. 21. But snow could fly in the Lehigh Valley on Tuesday, with a winter weather advisory to our north.