Complete the following sentence. In the International Panel on Climate Change (IPCC) business-as-usual scenario, by the year 2100 atmospheric carbon dioxide will increase by _____ over preindustrial levels.

Question

Quizplus · Accepted Answer

According to the IPCC's Fifth Assessment Report, the business-as-usual scenario predicts a carbon dioxide concentration of 936 parts per million by the year 2100, which is about three times higher than the preindustrial level of 280 parts per million. This represents a 300% increase over preindustrial levels.

Complete the Following Sentence