"As pressure grows from students who want to see their schools use financial clout to address environmental issues, Yale University’s investment office wrote to its money managers asking them to assess how investments could affect climate change and suggesting they avoid companies that do not take sensible “steps to reduce greenhouse gas emissions.”"

Faceless on Facebook, a shadowy but aggressive anti-environmental propaganda group called the Institute for Energy Research turns out, documents reveal, to be founded and funded by oil billionaire Charles Koch. It's mission: preserve tax breaks for big oil.

"Levels of heat-trapping carbon dioxide in the atmosphere rose at a record-shattering pace last year, a new report shows, a surge that surprised scientists and spurred fears of an accelerated warming of the planet in decades to come."

"The cloud of insecticide that drifted from a neighbour's corn field onto the asparagus on Andrew and Melissa Dunham's central Iowa farm cast a shadow over their organic vegetable business."