The Costs of Delay

This report emphasizes the need to take immediate action to lower emissions. It explains how concentrations increase when there are more carbon sources than sinks, and that the effects of higher concentrations are likely to be irreversible due to natural feedback loops that spin the system out of control. The report concludes that it will be easier and cheaper to reduce emissions that help achieve our carbon budget goals if we start today, rather than delaying climate action to future years or decades.