Daily Roundup

Stars on the Runway: Emma Thompson and other celebs join Greenpeace in an effort to stop Heathrow Airport's expansion by purchasing land within the perimeter of a proposed new runway. Ecorazzi

Calling All Zygotes: Researchers for the National Institute of Health began recruiting subjects for an ambitious new health study that will follow 100,000 children from conception to age 21. Associated Press

Hard Pills to Swallow: The Southern Nevada Water Authority has completed a study that reveals the top 11 pharmaceutical drugs found in U.S. drinking water. Green Daily

Hybrid Unveiled: Toyota introduced the third-generation Prius to the world at the Detroit Auto Show. Scientific American

Green My Google: The carbon footprint of a Google search is revealed. Anxious bloggers react with a flurry of blog activity. Wired