Participating Nations in the 1997 Kyoto Protocol Agreed to Reduce

Participating nations in the 1997 Kyoto Protocol agreed to reduce overall greenhouse gases emission

A) to as much as 20 percent below the levels of the 1990s through 2020.
B) to as much as 10 percent below the levels of the 1990s through 2010.
C) to as much as 100 percent below the levels of the 1990s through 2007.
D) to as much as 50 percent below the levels of the 1990s through 2100.