Why didn the US ratify the Kyoto Protocol?
US was the largest carbon dioxide emitter in 2004. This obviously shows that they did not follow the Kyoto Protocol, thus they did not sign it. Previous presidents have claimed that following the protocols might cause a decline in the economy, while Obama thinks that there is no point signing it as it is going to end. US also thinks it is unfair as China and India, which are large producers of carbon dioxide, are exempted from the protocol whereas US is not.