U.S. Announces Higher Fuel Economy and Lower Carbon Emission Standards for 2017-2025 Passenger Cars and Trucks
Updated: 2011-07-31 05:00:05
Yesterday, U.S. President Obama announced a new agreement with automakers and a broad coalition of stakeholders to dramatically increase fuel economy and reduce greenhouse gas pollution for all 2017-2025 new cars and trucks sold in the United States.
The new standards call for annual, incremental improvements in fuel efficiency to achieve a 2025 target of 54.5 [...]

Scientists quantify the abundance and diversity of fishes at Carpinteria Salt Marsh in California. Credit: Ryan Hechinger
All animal species — from birds to fishes, crabs to snails to worms, and the parasitic animals that live inside or on them – seem to follow one simple rule for how common each will be in an ecosystem.
“You [...]
5:57 a.m. EDT: Space shuttle Atlantis makes a pre-dawn landing at NASA’s Kennedy Space Center after completing 200 Earth orbits, and ending the program’s 135th and final flight. Photo: NASA/Kim Shiflett
New York City’s famed Times Square, pedestrianized.
With the average American driver spending nearly an hour a day behind the wheel, and up to 25 percent of income on transportation, the appeal of living and working in a walkable city is on the rise.
Which U.S. cities are the most walkable? According to Walk Score, which rates [...]