The Green Party has pledged to invest £100bn a year to fund its climate policy over the next decade, if it wins the election.
Where would the money come from and how would it be spent?
The Greens believe a large public investment, worth £1tn over 10 years, is essential to fight climate change and make Britain fossil fuel free by 2030.
The party says the money would go on building 100,000 energy-efficient homes each year, revolutionising transport infrastructure and creating hundreds of thousands of low-carbon jobs.
The bulk (£91.2bn a year) would come from borrowing, with the rest from tax changes.
This would represent a huge hike on current borrowing levels. The