Some private equity firms that back oil-and-gas businesses are becoming increasingly vocal about the role the sector can play as the world shifts to cleaner energy — and they are using the current energy crisis to make their point.

Energy-focused firms including NGP Energy Capital Management, Pickering Energy Partners and Quantum Energy Partners have been sending articles, reports and presentations to investors highlighting the importance of oil and natural gas during the transition to renewables. The effort comes as investors continue putting less money into fossil fuels.