A pipeline that links Canada's tar sands with the Gulf coast ruptured in the rural community of Mayflower, Arkansas. Host Steve Curwood talks to Mayflower resident Becky Naylor about the spill and the clean up effort.

Living on Earth celebrates Earth month in April by taking a look back at a Living on Earth story, then catching up with our sources for an update. This week we hear Bobby Bascomb’s report about using leftovers from a college cafeteria as a source of food for fish grown in an aquaponic system, and hear how the project has developed.

Greenland's 2012 summer ice melt was the largest on record. Ice specialist Marco Tedesco visits Greenland every year, and, tired of trying to convey the science of the melting ice with graphs and statistics, he found someone who could turn his data into music. Living on Earth’s Emmett FitzGerald has the story.

President Obama has pledged to take on climate change, but vacancies on the DC Court of Appeals may make that difficult. This court has a Republican majority and rules on many environmental regulations. Host Steve Curwood speaks with University of Texas Law Professor Tom McGarity about this obstacle to environmental rule-making. Case in point: the court recently ruled against the Federal Energy Regulatory Commission in a matter involving the ExxonMobil pipeline that ruptured on March 29, 2013 in Arkansas.

French car company Peugeot has created a new hybrid car that could be twice as efficient and half as pricy as traditional battery hybrids. The secret? It runs on compressed air. Peugeot engineer Karim Mokaddem talks about the technology with host Steve Curwood.

The pipeline that broke in Mayflower, Arkansas was carrying crude oil but bitumen from Canada's tar sands. It has the consistency of peanut butter. Jim Murphy from National Wildlife Federation tells host Steve Curwood about a petition before EPA for a moratorium on new or expanded bitumen pipelines until there are tighter regulations for transporting bitumen.

If pizza crusts and hotdogs are good enough for college students, are they also good for aquaponic fish? Living on Earth’s Bobby Bascomb reports on a project in Syracuse, New York to reduce food waste and grow sustainable food.

EPA is the federal agency overseeing the Mayflower oil spill clean up but media inquiries are funneled through Exxon. Reporter Lisa Song tells host Steve Curwood about the challenges of reporting on the spill.

Writer Mark Seth Lender contemplates rainbow trout in a crystal clear British Columbia Stream, and finds they seem to be contemplating him in return.