The first major emission controls on motor vehicles were introduced in 1975 with the advent of the catalytic converter. Today's cars emit less than 1 percent of the three "criteria" pollutants that came out of their tailpipes half a century ago. They emit relatively so little carbon monoxide, nitrogen oxides, and hydrocarbons that the collective... Cars now clean enough that household products rival them for air pollution
The first major emission controls on motor vehicles were introduced in 1975 with the advent of the catalytic converter. Today's cars emit less than 1 percent of the three "criteria" pollutants that came out of their tailpipes half a century ago. They emit relatively so little carbon monoxide, nitrogen oxides, and hydrocarbons that the collective... 
It might be the world’s largest single-company junkyard and pick-a-part business, if not for the prominent "No Trespassing" and "Drone-Free Zone" signs. Instead, it’s a massive storage facility in Colorado for thousands of disgraced VW and Audi TDI diesel vehicles awaiting whatever fate holds for them. At least the locale, in the... 
![Electric-car wells-to-wheels emission equivalencies in MPG, Mar 2018 [Union of Concerned Scientists]](https://images.hgmsites.net/tmb/electric-car-wells-to-wheels-emission-equivalencies-in-mpg-mar-2018-union-of-concerned-scientists_100646029_t.gif)
More good news about electric cars in the U.S.: the emissions associated with the electricity used to charge them have fallen. Again. Based on the latest data on powerplant emissions from the EPA, an electric car on the road in the U.S. now has average emissions as low as an 80-mpg car. DON'T MISS: Electric cars cleaner than any gas-only car for... 
First Paris, then a pair of German cities, and now the Eternal City. Two weeks ago, the mayor of Rome announced on her Facebook page that the city would ban diesel cars altogether by 2024. It's not clear whether the ban applies solely to the older, most-polluting diesels as it does already in Paris, or to any vehicle with a diesel engine. CHECK... 
![Global carbon dioxide emissions, 1850-2030 [CO2 Information Analysis Center, World Energy Outlook]](https://images.hgmsites.net/tmb/global-carbon-dioxide-emissions-1850-2030-co2-information-analysis-center-world-energy-outlook_100631742_t.gif)
The most recent detailed studies on the likely warming of Planet Earth are grim indeed, suggesting that we are collectively at "very high risk" for the most extreme effects of climate change. To stem that, mankind collectively will have to reduce its ongoing emissions of carbon dioxide radically and immediately. Now, one longtime advocate of... 
![Exhaust emissions from tailpipe [photo: Simone Ramella, 2005, used under Creative Commons 2.0]](https://images.hgmsites.net/tmb/exhaust-emissions-from-tailpipe-photo-simone-ramella-2005-used-under-creative-commons-2-0_100644014_t.gif)
That huge intake of breath you may have heard from across the Atlantic Ocean was the sound of German carmakers gasping at a court decision handed down on Tuesday. After a week's delay in issuing its ruling, a German court decided that individual cities in the country may ban vehicles with diesel engines to reduce air pollution. The decision could... 
Last November, the Environmental Protection Agency said it would rescind a rule that banned companies from fitting outdated, older, and dirtier diesel engines into brand-new "glider" chassis-cab trucks. Among the many regulations to limit emissions and other forms of pollution that EPA administrator Scott Pruitt has axed, this one was particularly... 
Fiat Chrysler will abandon the use of diesel engines in all its passenger vehicles by 2022, according to a report Sunday. The company has seen demand for diesel versions of its passenger cars in Europe collapse and faces high costs to get diesel engines to comply with emission limits in real-world use, it said. FCA is expected to announce the move... 
Investigators probing U.S. models of Mercedes-Benz sold with diesel engines have found software, possibly illegal under EPA rules, that helped them pass emission tests. Such software may be similar to that notoriously used in 580,000 vehicles sold by VW, Audi, and Porsche from 2009 through 2015 in what became the Volkswagen diesel emission... 
The processes of climate change don't care about politics. Or economics. Or public sentiment about science. Last December, an analysis showed the most accurate climate-science models to date predicted the worst effects in future years. Now, two more grim assessments have arrived. DON'T MISS: Most-accurate climate-change models suggest worst...