The document discusses the threats posed by climate change to tropical forests and biodiversity. It notes that 20% of annual greenhouse gas emissions come from deforestation. The warming climate has led to increased bark beetle outbreaks and range shifts of species. A CO2 target of 450ppm is considered too high and 350ppm is proposed as a safer level. Adaptation and limiting greenhouse gas concentrations through reducing emissions and deforestation are recommended approaches. Restoring ecosystems can help lower atmospheric CO2 levels.