People, culture and ecosystems have a right to survive.
That means
THE WORLD HAS A DUTY TO ACT
We need to stay below 2°C...
To avoid dangerous climate change the global temperature should not get any more than 2°C (3.4°F) warmer than it was at pre-industrial times (around 1800).
It has already been shown that
2°C would bring with it a set of devastating impacts to coral reefs, arctic systems and local communities. The Earth cannot afford to go above this.
...and this means rapidly cutting greenhouse gas emissions far below current levels.
We must start reducing emissions now and stay on a low emissions track to avoid loading the atmosphere with too much CO
2. In scientific terms this means staying well below a CO
2 concentration level of 450ppm (parts per million) in the atmosphere.