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Study finds all-electric rideshare fleet could reduce carbon emissions, but increase traffic issues

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Major ridesourcing companies Uber and Lyft have promised all-electric fleets by 2030 in an effort to reduce their carbon footprint. Overall, electrification reduces net external costs to society by 3–11% (5–24¢ per trip), depending on the assumed social cost of carbon. —Mohan et al. Mohan et al. 2c07030

Fleet 195
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Two-year study in Canada finds large trucks disproportionately contribute to higher levels of black carbon pollution

Green Car Congress

A two-year study led by researchers at the University of Toronto has found large trucks to be the greatest contributors to black carbon emissions close to major roadways. Research consistently links traffic emissions to negative effects on both the environment and human health. Jonathan M. Shairsingh, Robert M. 8b01914.

Pollution 231
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Smartphones and sensors as personal, real-time pollution monitors

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Air pollution varies widely over the course of a day and by location, even within the same city. Now scientists, reporting in the ACS journal Environmental Science & Technology , have used smartphone and sensing technology better to pinpoint where and when pollution is at its worst. Nieuwenhuijsen et al. Nieuwenhuijsen et al.

Personal 150
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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

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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). Boxplot of average PM 2.5 , BC, UFP, and LDSA [lung deposited surface area] concentrations for each commute mode. Click to enlarge.

Pollution 150
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T&E: Rising use of private jets sends CO2 emissions soaring

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CO 2 emissions from private jets in Europe increased by nearly a third (31%) between 2005 and 2019, rising faster than commercial aviation emissions, according to a new report from environmental campaign group Transport & Environment (T&E). According to the report, a four-hour private flight emits as much as the average person does in a year.

Emissions 418
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Latest GHG Inventory shows California remains below 2020 emissions target; much steeper rate of GHG reductions required

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California’s latest greenhouse gas data shows that while the state continues to stay below its 2020 target for emissions, there is much more work to do to achieve carbon neutrality by 2045. tons per person to 10.7 tons per person in 2018, a 24% decrease. Source: California Air Resources Board (ARB). Source: CARB GHG Inventory.

2020 221
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Portable sensors enable monitoring of pollution on smart phones; inferring pollution maps with greater granularity

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Boxes represent pollution reading locations during that window. Computer scientists at the University of California, San Diego have built a portable pollution sensors that transmit transmit their air quality readings to smart phones, allowing users to monitor air quality in real time. Nikzad et al. Click to enlarge. Click to enlarge.

Pollution 236