WASHINGTON — If you asked us why a dozen people sat on the floor next to the A.T.M. in a Chase Bank branch on Friday, waiting for the police to arrest us for this small act of civil disobedience, we would come up with the same answer as the famous robber Willie Sutton: “Because that’s where the money is.”

We don’t want to empty the vaults. Instead, we want people to understand that the money inside the vaults of banks like Chase is driving the climate crisis. Cutting off that flow of cash may be the single quickest step we can take to rein in the fossil fuel industry and slow the rapid warming of the earth.

JPMorgan Chase isn’t the only offender, but it is among the worst. In the last three years, according to data compiled in a recently released “fossil fuel finance report card” by a group of environmental organizations, JPMorgan Chase lent over $195 billion to gas and oil companies.

For comparison, Wells Fargo lent over $151 billion, Citibank lent over $129 billion and Bank of America lent over $106 billion. Since the Paris climate accord, which 195 countries agreed to in 2015, JPMorgan Chase has been the world’s largest investor in fossil fuels by a 29 percent margin.