War and Social Unrest

Water Pollution

Water Status of Soil
   Field Studies
   Growth Chamber Studies
   Modeling Studies

Water Stress x CO2 Effects on Plants
   Agricultural Species
   General
   Grassland Species
   Woody Species

Water Use Efficiency
   Agricultural Species
   Desert Species
   General
   Grassland Species
   Trees

Weather Extremes
   Drought (see Letter "D")
   ENSO (see Letter "E")
   Floods (see Letter "F")
   General
   Hurricanes (see Letter "H")
   Precipitation (see Letter "P")
   Storms (see Letter "S")
   Temperature (see Letter "T")

Weathering of Soil

Weeds
   Non-Parasitic: Competitiveness
   Non-Parasitic: Biodiversity Impacts
   Non-Parasitic: Miscellaneous
   Parasitic

West Antarctic Ice Sheet
   Collapse & Disintegration
   Dynamics
   Mass Balance
   Miscellaneous
   Sea Level

Wetlands

Wind
   Model Inadequacies
   Observations

Wind Farms

Wood Density

Worms