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A compendium of science-based information

Climate Change in Cities: Observations, Impacts, and Solutions

Responses of Communities and Ecosystems to Global Changes

Bark beetle outbreaks may influence forest fire risk

The Challenge of Understanding, Monitoring, and Managing the Health of Our Planet

The US federal government has ruled that CO2 is a pollutant

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Highest Levels in 800,000 Years This is the first time in at least 800,000 years, and possibly as long as 2 million, that levels have been this high.

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