The goal of the Phoenix mission was to understand the historic role of water in the frozen martian north, and to assess the region's habitability. (astrobio.net)
Over 160 years of detailed scientific work, addressing a wide variety of issues, such as the supporting role of water vapor in the atmosphere, has confirmed this as fact.» (realclimate.org)
The study sought to resolve misunderstands around the relative role of water vapour and CO2 as important greenhouse gasses. (airclim.org)