Major oil companies are anything but consistent on the biggest challenge of our time.

ExxonMobil: At Exxon’s annual shareholders’ meeting in Dallas on Wednesday, CEO Rex Tillerson said the company takes climate change seriously, but he also said that ending oil production is “not acceptable to humanity.”

More tellingly, he led the company’s staunch opposition to shareholder resolutions that would have required it to start acknowledging and mitigating its climate impact — for example, by putting out an annual report on how its business could be affected by climate policies, and by committing to the goal of keeping global temperature rise below 2 degrees Celsius. When it came time for voting, shareholders rejected eight of nine resolutions backed by climate activists.