restripe, It's dirty - This is the world's most destructive oil operation—and it's growing Can Canada develop its climate leadership and its lucrative oil sands too? Large enough to be seen from space, tailings ponds in Alberta’s oil sands region are some of the biggest human-made structures on Earth. They contain a toxic slurry of heavy metals and hydrocarbons from the bitumen separation process. By Stephen Leahy Published April 11, 2019 https://www.nationalgeographic.com/environment/article/alberta-canadas-tar-sands-is-growing-but-indigenous-people-fight-back
There obviously would be other reasons too why Biden is not into it. Research why Biden isn't as interested as you say he should be.