Climate change presents a fundamental challenge to sustainable development. Poor and developing countries, particularly the least-developed, will be among those most significantly affected and least able to cope with the anticipated shocks of climate change on their social, economic and natural systems. Given the difficulties in getting climate change on to the policy agenda in developed countries, it's no surprise that it remains a low priority in developing countries. But with scientific evidence increasingly clear on the potential impacts, it is now essential that climate change moves up the priority list, and countries understand their responsibilites, in addition to their risks.