As Philip Hammond highlights the economic impact of achieving net zero carbon emissions by 2050, Mark Littlewood, the IEA’s Director-General, spoke to BBC Radio 4’s Today programme about the trade offs which need to be made when protecting the environment.

Mark argues that the costs will be “colossal” and that we need accept that, in tackling climate change, there are trade offs and that money could be better spent elsewhere.

Listen to the full episode here, Mark’s interview begins at 1:34.