"Thinking globally requires wrestling with the way injustice and inequity stemming from historic exclusion and patterns of colonization is embedded in the very structures of every local place," says columnist Eric Hartman.

Everyone knows they're a nuisance, an eyesore, and a smelly. But worse, says guest columnist Kadafi El-Kardah, the EPA considers dog droppings a major source of water pollution in urban areas.

If Americans cut their driving by just 10%, the annual benefits would be equivalent to taking 28 coal-fired power plants off-line, says guest columnist Eric Hartman. Bicyclists "are the change."

The fourth annual ceremony honored individuals, businesses, nonprofits and government agencies working towards a more sustainable Philly.

Todd Collura is one of many people with disabilities who are concerned about the impact efforts to reduce or get rid of plastic straws will have on his ability to drink liquids.

“The goal of this bill is to reduce the single-use plastic [bags] by 80% in the first year," Squilla says.

"We in the suburbs, whether in Villanova or Haverford, are quite close to the city — and also deeply separated. A planetary health lens requires us to understand our interdependence, and to do community-building and world-building."