Climate change, as the United Nations Secretary-General has said, is “the defining challenge of our generation”. Its potential consequences for economic and social well-being are so profound that many have preferred to simply avoid imagining the unimaginable. There are, however, numerous solutions that already exist or are in the pipeline, many of which respond to other challenges such as reducing society’s inefficient use of resources, improving food security, health and livelihoods for the world’s poor, providing employment opportunities and even re-energizing a stagnant global economy in a process that is being described as “greening the economy”.