How would you get Britain to net zero?

Britain has committed to reach net zero carbon emissions by 2050. Last week it added an intermediate target (and Nationally Determined Voluntary Contribution, in the language of the Paris Agreement) of a 68% reduction by 2030.

There are many ways to get there, and the government department with responsibility for climate change, the department for Business, Energy and Industrial Strategy, has illustrated this with an interactive challenge. Visitors to the website can move a series of levers...