Every human produces a little more than 4.5 ounces of excrement per day. Multiplied by the 2.2 million customers of the Philadelphia Water Department’s wastewater system, the cumulative daily dump equals about 620,811 pounds, or about 310 tons. The story of biosolids (treated sewage sludge) starts with clean water in the toilet bowls of the
More
Update: On February 1, 2024, the Federal Energy Regulatory Commission (FERC) issued a preliminary permit to York Energy Storage, LLC for the pumped hydroelectric storage project the company is proposing in York County. The preliminary permit gives York Energy Storage priority for building a project on the site (essentially calling dibs) and opens up a
More
Tighter air pollution limits announced by the EPA on February 7 should have Philadelphians breathing easier. The new rule sets the limit, averaged over a year, of nine micrograms of tiny soot particles per cubic meter of air. “This final air quality standard will save lives and make all people healthier, especially within America’s most
More
I am standing in the Meadows, at the southwest corner of FDR Park, in a 33-acre mud pit roughly the size of eleven city blocks. Where once stood a mature woodland, now stands a vast strip of nothing—with an unimpeded view of I-95. The pit is prickled with hundreds of almost indiscernible, twiggy saplings. I
More
Nestled into the vast urban sprawl of Northeast Philadelphia sits the 1,600-acre historic green oasis known as Pennypack Park. Take a walk through the komorebi — the Japanese word for the dappled light created by sunshine filtering through trees — and you will find a hillside nook enclosed by deer fencing and tall tulip poplar
More
I am desperate for American chestnut trees to make a comeback, even though I know that it’s not happening anytime soon. I long to see our woods as they were 150 years ago. The forager in me misses the chestnuts I never got to gather from the forest floor. As Jessie Buckner writes in her
More
By Meg McGuire and Katherine Rapin In December 2023, the U.S. Environmental Protection Agency made a bold move for the Delaware River, proposing to raise the water quality standards in the estuary for the first time since the Clean Water Act of 1972. This upgrade would increase requirements for dissolved oxygen levels among the foundational
More
Skeptics of the green energy movement have always asked: What do you do when there’s no sun for the solar panels and no breeze to stir the blades of the windmill, but you still need power? Batteries can store excess energy created when the conditions are favorable to be used for precisely those times —
More
In a scene from the PBS docuseries “NOVA: Chasing Carbon Zero,” Chef Chris Galarza removes an ice cold frying pan from a freezer and places it on an induction burner. Only a moment later, he tosses some chopped peppers in the pan, which immediately start to sizzle. This impossible-seeming trick is one that Galaraza has
More
Hydrogen as an element is simple. Each atom has one electron and one proton. It’s first on the periodic table — the most abundant chemical substance in the universe. But hydrogen as a potential climate-friendly energy source is anything but simple. Hydrogen has long been used in dirty industries: cleaved from fossil fuels, it can
More