A look at how host cities compete for the gold in green -- and how Rio is gunning to overtake London for the sustainability gold.

Organics most often cost more – sometimes significantly more. Is that fair?

The relationship between business and nonprofits has evolved dramatically as the two sides found ways to develop mutually beneficial efforts, and -- more recently -- collaborative partnerships.

As shrimp aquaculture has boomed globally to keep pace with surging demand, the environmental toll on mangroves and other coastal ecosystems has been severe. Now, conservation groups and some shrimp farmers are creating a certification scheme designed to clean up the industry and reward sustainable producers.

The effects of climate change — including permafrost melt, more powerful storms and soil erosion — are threatening Alaskan natives’ way of life.

For a sustainability executive, a few tools stand out as compelling ways to help organizations become the most sustainable, best corporate citizens possible. Appreciative Inquiry is one of them.

The European Union plans to shore up its Emissions Trading Scheme following a dramatic fall in carbon prices. Does this mean an end to the carbon trading system?

Proponents of this nuclear technology argue that it can eliminate large stockpiles of nuclear waste and generate huge amounts of low-carbon electricity. But as the battle over a major fast-breeder reactor in the UK intensifies, skeptics warn that fast-breeders are neither safe nor cost-effective.

How can companies navigate the inevitable confusion that arises when sourcing and certification programs each define and measure sustainability by a different set of standards?

The latest idea from British retail pioneer Marks & Spencer offers a lesson in retail as a force for good.