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.

The Allentown EAC on Monday approved two letters to City Council with recommendations for the citywide parks plan, as well as the city's first Climate Action Plan, respectively.

Three African Servals escaped from Cricket Wildlife Center after a powerful storm last Wednesday damaged their enclosure. After dozens of reported sightings, two of the wild cats are back, leaving one left to capture.

For November, WLVR's Brad Klein and Bethlehem's "Backyard Astronomy Guy" Marty McGuire are taking a look at comets, with three getting a lot of attention as they pass through our inner solar system. This week, the subject is astrophotography.

The speaker series, which runs on select Thursdays through March, focuses on engaging residents about the local environment, as well as conservation efforts.

Craig Pfeiffer, Bethlehem's assistant director of planning and zoning, gave a presentation Thursday on the city's new subdivision and land development ordinance, more commonly known as a SALDO.

The baby alpaca was born Oct. 23. The zoo is taking suggestions for a name.

A Wednesday night storm brought damaging winds to the area, with gusts reaching up to 47 mph. The National Weather Service warned of damage to trees and utilities, and a wildlife center in Berks County suffered just that: A tree fell on an enclosure housing three African servals that have since escaped.

Current conditions, along with the continued drying of fine fuels, "could support the rapid spread of any fires that ignite, which could quickly become difficult to control," the National Weather Service said.

Mackenzie, along with officials from Wildlands Conservancy, the Appalachian Mountain Club and the Delaware & Lehigh National Heritage Corridor, on Wednesday morning hiked a portion of the property, lauding the federal Land and Water Conservation Fund that helped preserve it.

Easton's Environmental Advisory Council is continuing to work on an ordinance aimed at decreasing light pollution throughout the city.

Following a wind advisory Wednesday night, forecasters say the Lehigh Valley will see a fairly active pattern continuing through the weekend and into early next week as temperatures tumble.

For this year’s event, set for Sunday, officials are cutting out single-use water bottles and trading plastic medal packaging for paper, among other sustainability initiatives.