Particulate Matter
24 States Sue EPA Over New Soot Pollution Limit
The agency cites health risks of air pollution as reason for the new limit; states appear concerned it will kill their economies.
San Joaquin Valley Struggles to Lower Emissions
The San Joaquin Valley has some of the worst air pollution and particulate matter emissions in the nation, but agricultural sources are loosely regulated.
EVs Reduce Greenhouse Gas Emissions, but They're Not Pollution-Free
To reduce harmful particulate matter emissions, we need fewer cars on the road—electric or otherwise, according to the findings of a recent report.
Wildfire Smoke Affecting Communities Across the Country
Wildfires in California and Colorado are spewing out smoke that is traveling to other parts of the country. The health effects of the dirty air are substantial, and they could last long after the fires are out.
Report from London: Pollution Pricing Reduces Tailpipe Emissions
A new report shows that London's new emission fee, an additional driver charge that became operational 24/7 in April for all motor vehicles not meeting Euro standards that enter the congestion charge zone, has cut nitrogen oxide emissions by 31%.
U.S. Air Quality Declining, Taking Lives
Particulate matter air pollution has been on the rise since 2017, according to new research. Wildfires, economic activity, and lax regulation are potentially to blame.
Deep Economic and Racial Injustice Found in California Pollution Exposure
A new study confirms the facts of environment justice that has long been common knowledge in affected communities. Now the evidence can be mapped, as well.
When Academic Research Goes Bad
A 'misconduct investigation' decided that an industry-funded study, used by the EPA as the basis to roll back a regulation limiting the number of old engines that could be used in new truck chassis (i.e., "glider trucks"), was inaccurate.
The Far-Reaching Consequences of Remaking the Mercury Emissions Rule
The EPA intends to review the rulemaking process behind the mercury rule, the subject of a landmark Supreme Court ruling in 2015, to place more value on a rule's compliance cost to industry and less to its beneficial impact on human health.
A Departing Blow to Clean Air on Pruitt's Final Day
Friday may have been disgraced EPA Administrator Scott Pruitt's last day in office of the agency in charge of protecting the nation's environment, but he still managed to roll back a regulation to create lasting air pollution far greater than VW did.
Smog So Bad United Airlines Won't Fly There
It's not the poor visibility but the air quality, ten times worse than Beijing, that has caused the airline to stop flying to New Delhi.
Air Pollution from Natural Gas Industry in Pennsylvania on the Rise
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.
Cleanest Diesel Locomotives to Join Southern California Commuter Rail Fleet
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.
VW Scandal Obscures Diesel's Real Problem
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.
Air Pollution Forces Italian Cities to Enact Serious Driving Restrictions
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.
New Delhi Restricts Diesel Cars; Beijing Issues Second Red Alert
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.
Opinion: Supreme Court Ruling on EPA's Mercury Rule Will Have Little Effect
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
Should Electric Vehicles Be Taxed or Subsidized?
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.
The Health and Social Justice Implications of 'Line-Source' Air Pollution
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.
A 'Good News' Air Pollution Study for a Change
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.
City of Costa Mesa
Licking County
Barrett Planning Group LLC
HUD's Office of Policy Development and Research
Mpact Transit + Community
HUD's Office of Policy Development and Research
City of Universal City TX
ULI Northwest Arkansas
Town of Zionsville
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
