Amid all the bad climate news flowing out of the Trump administration, you might have missed a quiet new consensus congealing in think tanks and big business. The targets set out by the Paris climate agreement, they argue—to limit global temperature rise to two degrees Celsius (3.6 degrees Fahrenheit) —are a lost cause. It’s time to prepare for a world warmed by at least three degrees Celsius. The prescriptions that flow from those assessments are bleak. Naturally, Wall Street is looking to