La Niña
   Model Inadequacies
   Relationship to Extreme Weather
   Relationship to Global Warming
   Relationship to Precipitation

Lakes

Land Cover Change

Leaves
   Agricultural Species
   Carbon Sequestration
   Other Species
   Respiration
   Trees

Legumes

Life Span
   Animal
   Human
   Plant

Light x CO2 Effects on Plants

Lignin

Lipids

Little Ice Age
   Global
   Hemispheric
   Regional
      Africa
      Antarctica
      Arctic
      Asia
         China
         India/Pakistan
         Other
         Russia
      Australia/New Zealand
      Europe
         Central
         Mediterranean
         Northern
      North America
         Alaska
         Canada
         Central America and Mexico
         Conterminous United States
         General
         Greenland
      Oceans
      South America
      Tropics
   Solar Influence
      Other
      Precipitation
      Temperature
   Transition to Modern Warm Period

Little Medieval Warm Period

Long-Term Studies
   Non-Woody Plants
   Woody Plants
      General
      Lifetime Exposure to Elevated CO2
      Oak
      Pine
      Sour Orange
      Spruce
      Sweetgum

Low Temperature Tolerance