New technology will lead to a large increase in US oil extraction in the coming decade. This will lead to economic pressure on the US government not to "throw away the investment" by not extracting all that oil.

Scientists forecast "widespread misery and catastrophic biodiversity" if we don't cut back emissions.

Do we want to "throw away" all the investment we have made in our civilization? Burning the oil can do that. To avoid it, we need to leave 80% of the known reserves -- as of a few years ago -- in the ground.