Article from the Guardian
Diesels cars are sold, and taxed, on the basis of lower carbon dioxide (CO2) emissions when compared with petrol cars. But diesel car owners are not getting the fuel economy shown in tests. This means more CO2 than expected, and diesels also produce sooty sunlight-absorbing exhaust. We are paying a huge public health cost for the diesel cars in Europe and it is unclear if they are helping climate change at all.
Improved energy efficiency helps climate, air pollution and fuel poverty. Swapping car trips for public transport, walking or cycling works well and also produces massive health benefits from increased every-day exercise. Coal, heavy and unconventional oils are worst-case fuels for both air pollution and climate, due to carbon intensity and black carbon soot particles. Renewable energy and smart grids are therefore win-wins. Methane from agriculture, landfills, coal mines, gas leaks and fracking isoverlooked as a climate-warming gas and for the dangerous ground-level ozone that it creates.
Post Paris, we have a great opportunity to control climate change and reduce the global health burden from air pollution, but only if the right choices are made.
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