Given a choice of either A. Not changing your habits even a bit, and having the planet all fucked up in 100 years; or B. Drastically changing your habits, and

Given a choice of either A. Not changing your habits even a bit, and having the planet all fucked up in 100 years; or B. Drastically changing your habits, and having the planet all fucked up in 100 years and three hours, what would you choose?