The United States' first voluntary rating system for sustainable landscapes launched last week, a development its creators hope will do for the landscaping sector what LEED did for the building industry.

Forbes has ranked the 40 largest metro areas to determine the most, and least, toxic cities in the United States. Atlanta and Detroit were named the dirtiest, while Las Vegas and Sacramento rank among the cleanest.

Google, Microsoft and IBM are singled out for not doing enough to put IT's power to work on reducing greenhouse gas emissions, in the latest release of Greenpeace's Cool IT Challenge.

Would you believe that there are places and times when power companies generate so much renewable energy that they give it away?

SCI has released an innovative application that measures and predicts a facility's energy use so accurately that its projections can fall within 1- to 2 percent of actual energy consumption.

That's what Lamar Alexander wants you to contemplate. Here's what the Rep. senator from TN broached: "I want to ask you to do something that gives many conservationists a stomach ache whenever it is mentioned -- and that is to rethink nuclear power."

With their neck-and-neck scores in Newsweek's new green rankings, the two shipping companies' ongoing rivalry continues to heat up.

Today, Newsweek magazine unveils its first annual Green Rankings, the fruits of a near-Herculean endeavor: rating and ranking the environmental performance, achievements, and reputation of the S&P 500.

Converting a former safehouse for survivors of nuclear war into a data center offers a number of green benefits, as does siting the facility in Sweden's cooler climes.

Going far beyond the organic vegetable garden and playground made from recycled materials, President Barack Obama intends to get the White House LEED certified by the U.S. Green Building Council.