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Aviation emissions contribute to this health problem, according to a new study that suggests that airplanes flying at a cruise altitude of around 35,000 feet emit pollutants that contribute to about 8,000 deaths per year globally.

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Using coal for electricity produces CO2, and climate policy aims to prevent greenhouse gases from hurting our habitat. But it also produces SOx and NOx and particulate matter that have immediate health dangers.

A University of Wisconsin study was able to put an economic value on just the immediate health benefits of enacting climate policy. Implications of incorporating air-quality co-benefits into climate change policymaking found coal is really costing us about $40 per each ton of CO2.

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FedEx is announcing today that it has converted 92 of its trucks to diesel-electric hybrids (using lithium-ion batteries), bringing the total number of hybrids the company has to 264. There are a few reasons why these conversions are noteworthy. First, despite a bigger and more powerful engine (going from a 5.9L 175 HP diesel engine to a 6.7L 200 HP one), the converted trucks show an improvement of 44% in fuel economy, a decrease in particulate matter (PM) emissions of 96% (!), and a reduction of NOx emissions by 75%

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One giant container ship can emit almost the same amount of cancer and asthma-causing chemicals as 50m cars, study finds

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