July 15, 2018, 9am PDT
A new study builds an even stronger case for setting pollution controls at PM 2.5 to prevent increased risk of diabetes. The EPA's clean air regulations set a threshold much less restrictive than that level.
September 18, 2016, 9am PDT
The state's unique Clean Air Rule is called 'cap-and-reduce.' Businesses that fall under the cap are required to reduce emissions, just like California's cap-and-trade program. However, they can not be forced to purchase carbon credits.