France is set to ban the sale of any car that uses petrol or diesel fuel by 2040, in what the ecology minister called a "revolution". It's a political move, which many may call a master stroke, Nicolas Hulot (the ecology minister) called for something to happen in over 20 years time when you have left office. Last week, car manufacturer Volvo said all of its new car models would be at least partly electric from 2019, a risky move considering the rather low penetration of hybrid cars in the mass market. It is not clear what will happen to fossil fuel cars when the ban comes into place.

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