I have two methods of funding the climate crisis, we can keep global heating to 1.5 degrees.
1) The scourge of mental illness costs the UK alone £300 billion a year, and can be cured in thirty seconds by First Aiders trained in the Kadir-Buxton Method.
2)I campaign to have all countries cede all of their armed forces in agreed stages, to a democratically elected United Nations, until war becomes impossible; as discussed in the peace treaty between the USSR and USA that ended the Cold War by the US agreeing to cut WMD in return for democracy in Eastern Europe. The money saved can be spent on the climate crisis.