The latest bit I saw is that he wants to ban hydraulic fracturing (fraccing).
The Natural Gas supply increase of the last two decades, as well as Oil and Natural Gas Liquids is directly a result of fraccing. That has been so successful that 40% of electricity is powered by natural gas. A tremendous number of people in the middle of the country use Natural Gas as a primary heat source for homes and businesses.
Reservoirs deplete, and without new wells to replace that production (or re-stimulation of old wells, both of which will need to be fracced) production will decline, which means less supply, which means higher prices (not just motor fuels, but electricity, heat, fertilizer, and everything else).
That's another deal-breaker. I'd rather have whoever run against Biden, than fall for a guy who sounds good on a couple of issues, but is totally wrong on others.