South Korea considers reducing greenhouse gas emissions by 2020

From 1990 to 2005, South Korean greenhouse gas emission doubled (from 298 million tons to 594.4 million tons), which can be attributed to increasing energy consumption. In spite not signing the Kyoto Protocol, South Korea has been pressured to reduce greenhouse gas emissions.
The government of South Korea has one of three options for 2020: establish a maximum increase of 8 percent, maintaining 2005 levels, reducing 4 percent. The baseline year is 2005.
This is estimated to cost between 0.3 and 0.5 of South Korea's GDP.
The strategy includes promoting hybrid cars, renewable energies, nuclear energy and energy efficiency.