Hydrogen may have lost the race to fuel electric cars but it looks a likely contender to replace fossil fuels in trucks, ships, planes and heavy industry.
In Europe, emissions from new vehicles rise for the third year running.
Oakland in Califonia closes some streets to cars to allow more space for pedestrians, joggers, and cyclists.
A new study breaks down how Lyft and Uber contribute to climate change.
For years, Chinese city planners have prioritised cars, but they’re now taking a different route, writes Liu Shaokun.
How much can eco-driving contribute to emissions reductions?