Number far higher than previous reports show; scarcity fueled by population growth, consumption habits and demands from agriculture
Among the remaining issues is a divide between rich and poor countries over who should pay the cost for climate adaptation.
Over past quarter-century, orbiting workhorse has sent back thousands of images of planets and remote galaxies, expanding our knowledge of universe in unimagined ways.
Plan would require 30% reduction in greenhouse gas emissions from 2005 levels by 2030.
Report calls for reducing shorter-lived pollutants that could slow the pace of climate change and save lives