Buy Treasury bond, repo it, short future against it, buy more bonds, repeat ad infinitum... or at least until you are levered 30:1. All works great unless repo rates jump. See 2020-2021 for examples of this.
The energy return on energy investment of coal + carbon capture is worse than renewable energy adjusted for the quality of the energy. Full stop. And now renewable bids are coming in at the MARGINAL cost of firing EXISTING fossil fuel capacity. Game over.