Tips on keeping a house healthy. Many health issues that result from an unhealthy home can be prevented. [News Source]

Balloons mimic train pollution in protest. A few dozen people released black balloons into the sky to simulate air pollution Thursday morning during a protest against diesel emissions at BNSF Railway's train yard here. [News Source]

Big houses and green construction values often don’t mix. Bigger houses these days often mean two-story foyers; spacious kitchens with center islands; a family room with a vaulted ceiling; four bedrooms, including a master suite and room-sized walk-in closets; and a three-car garage. [News Source]

Green vehicles save Houston big bucks. The city of Houston has been buying eco-friendly vehicles – all hybrids with the city seal on the door – and now the fleet is paying off. [News Source]

Animal waste may supply cleaner power. Cows, pigs and chickens in the U.S. produce enough manure to supply 2.4 per cent of the nation's electricity if the waste were converted into burnable gas, an energy option overlooked by the government, researchers said. [News Source]

U.S. Steel gets OK for project to reduce pollutants. The Allegheny County Health Department on Thursday granted U.S. Steel Corp. a permit to make $1.1 billion in pollution-reducing upgrades at its Clairton Coke Works. [News Source]

Harried Dudley Leaves for London. BP's embattled chief executive, Robert Dudley, temporarily left the country Thursday after facing bureaucratic hurdles renewing his work visa but vowed to continue running the company from London. [News Source]

Arizona backs climate plan. Arizona is joining six Western states and four Canadian provinces with a proposal to limit greenhouse-gas emissions through a cap-and-trade system that would be the largest of its kind in North America. [News Source]

New online donor site is shaded green. GlobalGiving, the online system through which donors can support international charitable projects, will introduce a new Web site listing 25 projects that it has determined entail minimal greenhouse gas emissions and have a positive impact on climate change. [News Source]

Reid seeks energy refuge in solar. Senate Majority Leader Harry Reid has found a refuge in the nation's preoccupation with record energy prices. [News Source]

Is your car a 10? Your vehicle will soon be rated based on its eco-footprint. Picking an eco-friendly car in California will soon be easier, now that the state is mandating a pollution label on all new models starting in January 2009. [News Source]