Climate change threatens ecosystems, which support the diversity of life on earth. There are more than 96,500 species on the International Union for Conservation of Nature Red List of threatened species. More than 26,500 are near extinction, including 40% of amphibians, 34% of conifers, 33% of reef building corals, 25% of mammals and 14% of birds. What would our world be like without them? For images showing what we stand to lose if climate change continues unabated, go to ourclimatechallenge.com.