August 27, 2016, 11am PDT
With a 32 percent increase in natural gas drilling in the Marcellus Shale in Pennsylvania, it is no surprise that emissions are increasing as well, particularly sulfur dioxide. However, the increase was dwarfed by decreases from the power sector.
July 20, 2016, 8am PDT
Forty so-called Tier 4 locomotives, a U.S. Environmental Protection Agency designation requiring a dramatic reduction in particulate and nitrogen oxide emissions, will be joining Metrolink's fleet covering 512 track miles in six counties.
January 7, 2016, 7am PST
It's easy to focus on the sensational headlines based on the fraud committed by Volkswagen, but doing so masks the deadly and ongoing problems of diesel emissions plaguing the world's densely populated cities.
December 29, 2015, 7am PST
Unusually mild and dry weather in much of Italy has worsened air quality so much that city governments are acting to reduce emissions from one of the chief sources of air pollution by enacting odd-even license restrictions on driving.
The New York Times - Europe
December 21, 2015, 2pm PST
It took an act of the Supreme Court for India to address the incredibly unhealthy levels of particulate matter in New Delhi. New rules are aimed at diesel cars, SUVs, and taxis. In Beijing, pollution triggered a red alert for only the second time.
The New York Times - Asia Pacific
July 5, 2015, 9am PDT
When the Supreme Court ruled 5-4 against the Environmental Protection Agency on June 29, it appeared as a blow against mercury regulation by the EPA and a victory for coal power plants. David Roberts of Vox looks closer and finds that's not the case
July 1, 2015, 8am PDT
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.
May 31, 2015, 9am PDT
The most dangerous air pollution is not smog and is barely known by the public, writes Bill Adams, editor of UrbDeZine. Line-source particulate matter air pollution could change the way the public thinks about road projects and gas powered cars.
March 9, 2015, 7am PDT
Too often we report on new studies showing how air pollution worsens public health, often causing premature death. For a change, here's a study showing how efforts to improve air quality in Southern California have boosted public health in children.
May 1, 2014, 5am PDT
In a huge and perhaps unexpected win for the EPA, the Supreme Court on April 29 reversed an appellate court panel ruling that had rejected their attempt to regulate interstate air pollution caused by about 1,000 coal-fired power plants in 28 states.
The Wall Street Journal - Politics and Policy
April 16, 2014, 7am PDT
According to a new EIA report, the cost advantages of liquefied natural gas make it an attractive alternative to diesel fuel for major U.S. freight railroad companies. Hybrid diesel-electric locomotives on order for 5 states will power HSR routes.
December 29, 2013, 11am PST
Though smoking is on the decline in China, lung cancer rates are rising. Twenty-year olds have joined seniors as likely patients, attributed to the toxic clouds containing particulates that regularly envelope China's eastern cities.
Los Angeles Times - World
October 9, 2013, 10am PDT
Thanks to a Calif. law implemented in 2008 requiring ocean-going ships to switch from high-sulfur bunker fuel to cleaner fuels within 24 miles of the coast, Bay Area air quality significantly improved by reducing deadly particulate emissions.
September 18, 2013, 1pm PDT
As China's hazardous environment becomes a "potent political issue", the central government has released a detailed plan that aims to clean up the country's abysmal air pollution.
September 12, 2013, 10am PDT
Call it the law of unintended consequences. Alerts of "bad air days" that ask motorists in the Wasatch Front to reduce driving had the opposite effect, prompting some residents to drive away from lowlands to the mountains where air may be healthier.
July 18, 2013, 10am PDT
An NAS study released July 08 shows that if you live in north of the Huai River in China, you can expect to live about 5.5 years less than those to the south. Air pollution, specifically particulate matter from burning coal, is the primary culprit.
April 3, 2013, 9am PDT
New details from a landmark study on the leading causes of death worldwide presents a gloomy picture of the effect of air pollution on the health of China's residents. The toll is 25 million healthy years of life snatched from the population.
December 17, 2012, 9am PST
In what could be viewed as a classic environmentalist vs. business showdown, the EPA tightened by 20% the annual standard for soot over the objection of industry and some in Congress who fear it will dampen economic growth.
The Hill's Energy & Environment Blog
November 21, 2008, 12pm PST
An economic study has been published showing that the costs of air pollution to the 20 million Californians living in the state’s (and nation’s) two most polluted regions, the LA basin and San Joaquin Valley, to be around $28 billion annually.