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California ARB study finds commuters’ exposures to air pollution greatly depends on mode of travel; light rail, personal vehicles the lowest

Green Car Congress

The mode of travel you take on your daily work commute can make a big difference in your exposure to air pollution, according to a new study by researchers at the California Air Resources Board (ARB). Commute modes included travel by car, bus, light rail, train, and bicycle. Click to enlarge.

Pollution 150
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Achates near-zero heavy-duty opposed-piston diesel enters fleet service; compliant with 2027 NOx levels

Green Car Congress

liter, heavy-duty opposed-piston, three-cylinder diesel engine it developed in a project funded by the California Air Resources Board (CARB) and several partners ( earlier post ) has entered fleet service with WALMART Corporation in a Peterbilt 579 tractor. The project team also demonstrated that the engine reduces carbon dioxide by 10%.

Diesel 468
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Study shows two-stroke scooters dominant source of air pollution in many cities; asymmetric polluters

Green Car Congress

A study by European researchers has found that two-stroke (2S) scooters, although constituting a small fraction of the fleet, can dominate urban vehicular pollution through organic aerosol and aromatic emission factors up to thousands of times higher than from other vehicle classes. Emission factors (EFs) from scooters and other vehicles.

Pollution 362
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WUSTL study finds use of air conditioning reduces in-car pollution

Green Car Congress

Traffic is a major source of harmful pollutants; daily peak exposures tend to occur near roadways or while traveling—or being stuck—on them. That gave them rare, real-world look at pollutant exposure. With windows closed, the pollutants took longer to enter the vehicle cabin, but also longer to exit it.

Pollution 186
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Black carbon linked to increased cardiovascular risk; exacerbated by co-exposure to motor vehicle emissions

Green Car Congress

Black carbon (BC) from incomplete biomass and fossil fuel combustion is the most strongly light-absorbing component of particulate matter (PM) air pollution and a major climate-forcing emission. We wanted to identify the pollution sources that most impact human health to help inform these pollution control efforts.

Carbon 275
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Three-part catalyst study advances conversion of CO2 to ethanol

Green Car Congress

An international collaboration of scientists has taken a significant step toward the realization of a nearly “green” zero-net-carbon technology that can efficiently convert CO 2 and hydrogen into ethanol. There has been much work on carbon dioxide conversion to methanol, yet ethanol has many advantages over methanol.

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California “gasoline superuser” bill advances; focusing ZEV incentives on reducing gasoline use

Green Car Congress

By shifting the biggest gasoline users into ZEVs first, AB 2816 also reduces the total number of ZEVs that would be needed to reach the state’s near-term target of cutting light-duty vehicle emissions in half by 2030. Light duty vehicles cause 28% of California’s total carbon emissions and pollute the air near freeways and busy roads.

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