The insurer noted that it's trying to "minimize sustainability risks." Lower emissions and renewable energy are simply better for its business -- it's less likely to pay out if it keeps climate change and pollution (not to mention use of finite resources) in check. Likewise, it sees investing in solar and wind power as ways of driving down its risks.

This isn't the first insurance company to back away from coal. Earther pointed out that insurers like Allianz and Dai-ichi Life Insurance have also dropped support for coal-dependent clients. However, this latest move could increase the pressure on companies to ditch fossil fuels even if they don't see the environmental benefit. If they want insurance, they might not have much of a choice.