If this watercycle doesn't persist, it could exasperate the demise of the forests and with it, agriculture across south america. If there isn't enough forest cover to do this job efficiently, temperatures across the globe will see a spurt. Sea levels will rise. People in many countries will be displaced from their homes as the fury of climate change intensifies. Many ticians still believe that climate change is someone else's problem. It's hard to imagine the deeply interwoven nature of the world's ecosystem and how it could all collapse 20 to 30 years in the future.