Liquefied natural gas could be the magic words for future transportation. LNG is not yet widely used in Germany and the EU, but it's much cleaner than diesel. We visit Germany's LNG pioneers.
Nitrogen oxide (NOx) emissions were at the center of the Dieselgate scandal that swamped Volkswagen two years ago, but the carmaker's head of development says that problem is solved with its latest engines.
There's massive public worry about diesel car emissions these days - but the really big polluters are plying our waters.
Dirty air resulted in the premature deaths of more than 500,000 people in the European Union in 2014, the European Environment Agency reports. Pollution needs to be reduced, agency heads and environmentalists agree.
Canada has given Malaysia's oil giant Petronas the green light to build a liquefied natural gas pipeline along its Pacific Northwest coast, imposing tough environmental protection requirements amid massive protests.
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