The EPA chose to reduce the current standard of 75 parts per billion, unchanged since 2008, by 5 ppb. Public health and environmental groups insist that a safe standard would be 60 ppb, while businesses point to the high costs to comply with 70 ppb.
5 days ago   The Wall Street Journal
On the heels of President Obama's Clean Power Plan rule that reduces carbon dioxide emissions from power plants, the new rule focuses on the other major greenhouse gas, methane, and rather than coal, it is focused on oil and gas drilling.
Aug 20, 2015   The Atlantic
The answer depends on location, according to previous studies on EVs. The study from NBER evaluated both gas and electric-powered vehicles to determine their effect on the environment. A surprising recommendation is a new road funding option.
Jul 1, 2015   CityLab
Arguably just as important than the sales of new vehicles, e.g., hybrids and EVs, are the consequences of not buying new cars.
Dec 14, 2014   Scientific American
In EPA’s leadership blog, Administrator Gina McCarthy announces the agency's new standards to reduce the sulfur content in gasoline by 60% in 2017 and new Tier 3 emission standards for cars and light trucks to reduce criteria and toxic air pollutants
Mar 5, 2014   EPA Connect