In the last post, I argued that we’ve got to strip the carbon out of almost all of our existing stock in order to hit the 2050 target. That’s a huge challenge. Phil Clark summed it up in a comment:
I would consider it a near impossibility to upgrade every old leaky house without some massively radical action.
I completely agree: it’s going to take radical action. But what kind? The picture gets a bit clearer if you take a look at where the carbon is coming from.
Looking at the graph from my previous post, we can take a snapshot of where the emissions will come from in 2050 under a business-as-usual scenario.

The pie chart above shows that of the emissions from houses in 2050, almost 2/3 will come from heat. Electricity, on the other hand, will only make up just over a third of emissions. Without radical action to decarbonise heat, we won’t get anywhere near the 2050 target.
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