414 is a very bad number

After a couple of weeks of action by Extinction Rebellion, Parliament made a formal declaration of 'Climate Emergency' 

The Committee on Climate Change has produced some recommendations, 

The reports key findings are that:
The Committee on Climate Change recommends a new emissions target for the UK: net-zero greenhouse gases by 2050.
In Scotland, we recommend a net-zero date of 2045, reflecting Scotland’s greater relative capacity to remove emissions than the UK as a whole.
In Wales, we recommend a 95% reduction in greenhouse gases by 2050.

A net-zero GHG target for 2050 will deliver on the commitment that the UK made by signing the Paris Agreement. It is achievable with known technologies, alongside improvements in people’s lives, and within the expected economic cost that Parliament accepted when it legislated the existing 2050 target for an 80% reduction from 1990.

However,

The UK is currently not on track to meet even the existing target of 80% reduction by 2050.

Even if we, and the rest of the world, stopped all carbon emissions today the global warming since the start of the industrial revolution will exceed 1,5°C

To avoid the worst of the upcoming climate catastrophe we have to do everything we can to halt greenhouse gas emissions quickly and sequester atmospheric carbon, driving net emissions negative.

The targets of net zero by 2025 or 2030 suggested by Extinction Rebellion and the Green Party are more appropriate to survival of civilisation than those recommended by the Committee on Climate Change.

Climate change is with us today. The last few weeks have seen two unprecedented cyclones reach Mozambique, new April record temperatures have been seen from Vietnam to India and as I write Cyclone Fani is about to strike India, earlier in the season than ever.

Our best proxy measure of things to come, the Keeling Curve, shows that CO2 levels are now 3ppm higher than a year ago.
Four years ago, May 2015, I warned that 404 was a bad number.
Things are getting worse, exponentially.

Much of that CO2 will remain in the air for centuries and millennia, forcing warming and, as it gradually gets absorbed by the seas, forcing ocean acidification.

Sea level will continue to rise as much of the ice melts.

Action emerges but complacency still rules.

With government not delivering the required leadership, we need the Extinction Rebellion.