What's the alternative motivation besides profit? How do you get some people to do what you want without paying them?
Fear won't work. People can just decide not to be afraid. And, since doomsday predictions have always been wrong, they would be wise not to fear the end you're warning them about. Altruism won't work either.
People focus on profit/money because its a clear way to motivate others. Everything else is just salesmanship, putting a gun to someone's head, or asking "pretty please".
I would think saving the planet would be motivation enough. But if nothing else, I think the US government should fund and subsidize the shift to a new energy infrastructure, through research grants, tax incentives, etc. It's clear that the need for profit is holding us back from making the changes we need to make. So take the profit out of the equation.
In a larger scope, it is interesting to me that profit is the only way we can think of to motivate people. It's as if we weren't creative beings at heart. Absent the profit motive, I think people would create and build things out of necessity, creativity, or a desire to make life better for oneself and others. Profit is actually a poor motivator because a well-done job or quality product is only a by product of a desire for profit. If a profit can be made with shoddy work or an inferior product, that's just as well; because the motivation is profit, not doing a good job.
The US government has shown that it will come up with large amounts of money when properly motivated. We need a Manhattan Project for climate change, since the private sector has shown itself incapable of the task. Government is more free to act precisely because it doesn't have to make a profit. It is not constrained in that way. It can, and does, print as much money as it needs.