Is it already to late?

According to some scientists we may have already reached a point of no return on global warming. The Artic ice is melting and it is possible that we may have reached a 'tipping point' beyond which there is nothing we can do to reverse the loss of the ice and be forced to give way to rising sea levels and say goodbye to the Netherlands possibly.

Part of me wants to reject it as flawed or the claims as excessive, the evidence however suggests cause for concern. Maybe it isn't to late, but will anything be done before it is?