The coal, oil, and natural gas that drive the industrial world's economy all contain carbon breathed in by plants many years ago -- carbon that now is returning to the atmosphere (1) chimneys, exhaust pipes and other sources. ... The doubts have sent researchers into forests and grasslands, out to the tundara and to sea, to track down and understand the missing carbon.
――帯広畜産大学 前期日程(2月25日実施)――2005年