* Greenpeace Germany has a gas division. They've now split it off and officially only own 5 shares (while being headquartered in the exact same building, by the exact same Greenpeace members): https://en.wikipedia.org/wiki/Green_Planet_Energy
* Companies like Total have made use of their enormous war chest to take control of multiple organisations that push wind & solar power (https://www.theguardian.com/environment/2015/jan/22/fossil-f...), knowing full well it cannot cover all of our energy needs and knowing they will be here to sell natural gas, continuing the use of fossil fuels.
* Anti nuclear organizations are very often bankrolled by large oil lobbies (https://www.forbes.com/sites/kensilverstein/2016/07/13/are-f..., https://environmentalprogress.org/the-war-on-nuclear), once again, pushing to get nuclear replaced with natural gas.