FACTBOX: Global green economy stimulus plans

(Reuters) - The United States, Europe, China and South Korea lead global "green" spending plans after committing $300 billion-500 billion to boost low-carbon technologies and protect the environment, under wider plans to boost the global economy.

Green spend accounts for about 15 percent of total economic stimulus cash of $2 trillion-3 trillion.

Views vary on how much money is needed to fight climate change. Actual global investment in low-carbon technologies was about $150 billion in 2008.

Estimates on the long-term investment required, and of short-term, green stimulus spend committed so far, follow.