As climate change makes smog and bushfires more common, people will die from air pollution at increasingly high rates – especially in densely populated cities.
Transport is one of the world's biggest polluters, but on the path to net zero, aviation is reinventing itself, potentially building a new kind of jet age.
Indonesia wants to increase its use of electric vehicles but tax incentives have had a fairly limited impact. The cost of rolling out public charging stations and other supporting infrastructure is a challenge.