World seeing sobering signs of climate change 's accelerating impacts , say politicians . Comment: These laws are not yet enough to limit global average temperature rise to 2 degrees Celsius ( 3.6 degrees Fahrenheit ) above pre-industrial levels , the level scientists say we must not breach if we are to avoid the worst risks of climate change . U.N. action on climate change will only be credible if backed up by national legislation , they say . `` The fate of our planet depend on our actions , '' they write .
World seeing sobering signs of climate change 's accelerating impacts , say politicians . Comment: U.N. action on climate change will only be credible if backed up by national legislation , they say . `` The fate of our planet depend on our actions , '' they write .