![Exhaust emissions from tailpipe [photo: Simone Ramella, 2005, used under Creative Commons 2.0]](https://static.hgmsites.net/images/cache/exhaust-emissions-from-tailpipe-photo-simone-ramella-2005-used-under-creative-commons-2-0_100644014_150x100.jpg "Microwave-pulse ignition, backed by ex-Porsche CEO, claims lower emissions")
![Scene from 'The Grand Tour'](https://static.hgmsites.net/images/cache/scene-from-the-grand-tour_100581778_150x100.jpg "Amazon renews "The Grand Tour" for fourth season, but without studio segments")
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![Exhaust emissions from tailpipe [photo: Simone Ramella, 2005, used under Creative Commons 2.0]](https://static.hgmsites.net/images/cache/exhaust-emissions-from-tailpipe-photo-simone-ramella-2005-used-under-creative-commons-2-0_100644014_120x80.jpg "Oil industry funding supports campaign to roll back fuel-economy rules")
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