Reuters: The latest draft UN report on climate change points to options for disaster planning, drought and flood-resistant crops, and water and energy saving. Rising sea levels are a direct threat to low lying islands in the Pacific. (Credit: ABC) Global warming will disrupt food supplies, slow world economic growth and may already be causing irreversible damage to nature, according to a United Nations report due this week that will put pressure on governments to act. A 29-page draft by the Intergovernmental...