Budget to fall back in deficit and stay in deficit for 40 years, page-4

The climate change is referring to decarbonistion:

"Decarbonisation is a major threat to revenue given Australia has relied extensively for decades on the taxes gleaned from exports of such commodities as coal and gas.

“Global demand for bulk commodities, and therefore reliance on them as a source of company tax revenue, is also expected to fall,” the report said.

Thermal coal exports, worth $60 billion last year, will be reduced to 1 per cent of that in 40 years if the world limits global warming to 1.5 degrees above pre-industrial levels. They will be cut by 50 per cent if the world caps the temperature rise to a more realistic 2 per cent.

The more immediate threat to revenue from decarbonisation is the loss of a net $14 billion a year in fuel excise from the shift to electric vehicles."