The document discusses several effects of global warming including the reduction of sea ice and receding glaciers which will detrimentally impact many animals. Within 20-30 years, melting Himalayan glaciers will increase flooding in Asia and affect over 1 billion people's fresh water supply. Droughts and increased desertification from global warming will likely cause mass migration, malnutrition, war over resources and diminished crop growth. Additionally, deforestation has already destroyed over 80% of the world's natural forests, with up to 90% of West Africa's coastal rainforests disappearing since 1900.