When is an energy efficiency offer too good to turn down?

Lower power bills seem like a slam dunk argument for energy efficiency, but companies are still slow to act. Now, a group of academic researchers is trying to find out why. Read More

Amazon moves on renewables — after a push from Greenpeace

The world's biggest Internet host announces a deal to soften its 'dirty' reputation. But don't give Greenpeace all the credit. Read More

Will Silicon Valley ag tech really grow with farmers?

A word of advice from farmers to entrepreneurs: Walk in our muddy boots before tossing us new tech products. Read More

Most food companies ignore the risks of water scarcity

High marks go to Coca-Cola, Unilever and General Mills for mitigating water risks, but most big food companies still ignore their water footprints, according to a new study. Read More

Move over, Tesla: electric vehicles are about to be super-sized

The humdrum markets of public transit and municipal garbage trucks are poised to be upended by new electric offerings. Read More

Earth Day at 45: Denis Hayes on going global, 'dreadful failure' of climate action

The annual holiday synonymous with environmentalism has gone global four decades after its inception, but those closer to home question what should come next. Read More

Software that grows with the sustainability movement

On top of a new product billed as a data foundation for all of a company's sustainability functions, software provider PE International today is also unveiling a new name to help adapt to a rapidly-evolving market. Read More

Apple swings for the fences with $848 million solar deal

The tech giant Tuesday announced a plan with First Solar to power all California operations with the sun, potentially becoming the budding renewable energy sector's biggest commercial deal ever. Read More

How to do business in a world running out of water

Respecting human rights to water should be embedded into operations, says new U.N. guidance. Coca-Cola, Pepsi Co. and Nestle are on board. Read More

The real social cost of carbon: $220 per ton, report finds

New research suggests that government models for the economic costs of climate change drastically underestimate the true toll of carbon. Read More