Can electric cars manage Welsh hills to tackle pollution?
BBC Wales' India Pollock takes an electric car on a test drive around Wales' hilly towns to see how well it can cope if it is be used in the fight against air pollution.
Public Health Wales has said pollution is a "public health crisis", second only to smoking and responsible for 2,000 deaths in Wales every year.
The Week In Week Out programme looked at some of the solutions being trialled in Wales and beyond in the attempt to cut traffic emissions.
So I Can Breathe
A week of coverage by BBC News examining possible solutions to the problems caused by air pollution.
08 Mar 2017