pwc.com : "The annual PwC Low Carbon Economy Index centres on one core statistic: the rate of change of global carbon intensity. This year we estimated that the required improvement in global carbon intensity to meet a 2ºC warming target has risen to 5.1% a year, from now to 2050.
We have passed a critical threshold – not once since 1950 has the world achieved that rate of decarbonisation in a single year, but the task now confronting us is to achieve it for 39 consecutive years."
