The complex challenge of global climate change requires a global response that will draw on the power of global markets and the promise of technology to achieve emissions reductions most flexibly and costeffectively in the coming century.
Climate change is a really simple problem and can be solved within a couple years. 
mnli hypothesis: Climate change is a really simple problem and can be solved within a couple years.  premise: The complex challenge of global climate change requires a global response that will draw on the power of global markets and the promise of technology to achieve emissions reductions most flexibly and costeffectively in the coming century.