The great L.A. smog that really no one saw coming

The summer of 1943 was a season that Los Angeles citizens would do well to always remember. For it was during this time that the L.A.-area’s first major smog episode occurred. According to the California Environmental Protection Agency Air Resources Board (CARB), associated fallout from this event included, among other things, upset stomachs and “burning … Read more

Catastrophe alone should not be what forces our hand to step up to save air

Catastrophic events like the massive wildfires burning in the western U.S. alone should not be the impetus that gets the world to pay close attention to air pollution’s presence, that and the dangers such pollution presents. Smoke from fires pouring into cities like Los Angeles, Portland, San Francisco and Seattle have caused skies there to … Read more

High-efficiency air-filtration system for cars, businesses, homes

With wildfires raging in many parts of the western U.S. and with smoke from the Creek Fire in the Sierra National Forest flowing down into California’s central San Joaquin Valley darkening skies, turning sun-ups and sunsets red and impacting health including mine, I can’t help but be reminded of just how important clean air is … Read more

When it comes to dodging air pollution roadway users can’t win for losing

Where avoiding polluted air goes, roadway users just can’t seem to catch a break. I mean, while out on the road we’re exposed to air toxics left, right, up, down, front, back, you name it – all ways but loose it seems. Tailpipe pollution or what is more commonly referred to as exhaust. Bits and … Read more

Motor vehicles one source of roadway air pollution – pavement asphalt is another, research reveals

The below Sept. 2, 2020 news release is from Yale University. Asphalt is a near-ubiquitous substance — it’s found in roads, on roofs and in driveways — but its chemical emissions rarely figure into urban air quality management plans. A new study finds that asphalt is a significant source of air pollutants in urban areas, … Read more

Air pollution, digestive tract disorders and the connection between them – revisited

Strong evidence suggests there is a link between air pollution and compromised gut health. This topic was first explored on the Air Quality Matters blog on Feb. 26, 2014 in the post: “Air pollution, digestive tract disorders and the connection between them.” Since that time, some important developments have surfaced in the academic, medical and … Read more

California ports poised to get cleaner, greener with new state rule

The below Aug. 27, 2020 press release is from the California Environmental Protection Agency Air Resources Board. The California Air Resources Board today approved a new regulation designed to further reduce pollution from ocean-going vessels while docked at California’s busiest ports. The rule builds on progress achieved by the groundbreaking At-Berth Regulation adopted in 2007. … Read more

The climate change exchange: Separating fact from fantasy

A recent comment to the Air Quality Matters post “Why opacity cannot be the singular clean-air determinant” reads: “Climate stories have been dominating worldwide headlines in recent months. It seems that now more than ever, we are becoming increasingly aware of the effect of pollution on both our environment and on our health.” Yes they … Read more

Climate change: Making or not making air pollution in America worse?

There are three distinct possibilities: There is evidence that climate change has altered the concentration or level of pollution in air The evidence of the effect climate change has on the concentration or level of pollution in air is lacking Climate change has no influence on pollution in air period The American Lung Association seems … Read more

1940s-’80s global-mean-surface-temp normalization: Were Earth-covering sulfate aerosol clouds the cause?

Between roughly 1850 and the present day, the trend in global mean surface temperature (GMST) has, generally speaking, been positive, meaning the GMST has been rising. Interestingly, though, from 1940 to 1980 GMST stabilized. (See temperature plot at bottom). Incidentally, as reported by NASA’s Earth Observatory the GMST has increased a total of 0.7 degrees … Read more