In his 2009 book ("Storms of my Grandchildren") and in an open letter to US President Obama, climate scientist James Hansen criticized the Kyoto Protocol for being ineffective [REF].
The overall umbrella and processes of the UNFCCC and the Kyoto Protocol have been criticized for not having achieved the stated goals of reducing the emission of carbon dioxide (the primary culprit blamed for rising global temperatures of the 21st century) [REF].