“We have less than a decade to switch from fossil fuels to clean energy. We have already increased global temperature by 1oC from pre-industrial levels. If we are to halt its increase at 1.5oC, there is a limit to the amount of carbon we can yet add to the atmosphere–our carbon budget–and, at current emissions rates, we will add this amount before the end of the decade.6 Our careless use of fossil fuels has set us the greatest and most urgent challenge we have ever faced. If we do make the transition to renewables at the lightning speed required, humankind will forever look back on this generation with gratitude, for we are indeed the first to truly understand the problem–and the last with a chance to do anything about it.”