The world’s richest countries and greatest contributors to global warming are investing billions of dollars to limit the worst consequences, reports journalist Andrew C. Revkin. These same countries are spending far less to limit climate hazards in the world’s most vulnerable regions. The UN underscores this climate divide: poor regions like Africa and Southern Asia face the gravest risks from global warming. Furthermore, precipitation is gradually shifting away from the equator towards the poles. Experts argue for a strategy to cut greenhouse gases and help vulnerable regions to become more resilient. One option would be to sell genetically modified crops.