【单选题】Last year was the fourth warmest since recordkeeping began in the 1880s and 2005 could go down as the warmest ever recorded, NASA scientists reported in a new analysis of temperature data. 'There has ...
A.
the increasing greenhouse gases
B.
the presence of El Nino
C.
the imbalance of the earth's energy
D.
the Earth's increasing absorption of the Sun's energy.