At a time when public finances are under huge strain, we surely do not need to pay celebrities to wax lyrical to mandarins. Unless American comedians can make the Home Office fit for purpose, the taxpayer won't be laughing.

Denmark and the UK are in agreement that our future prosperity depends on stimulating green growth, and getting off the oil hook.

But we must also look at renewable heat technology. More combined heat and power schemes, putting waste heat to better use. More district heating schemes. And more electric air and ground-source heat pumps, drawing warmth from the outside world to heat the indoors. Better insulation, smarter homes, and more efficient heating can help us cut our energy demand.

Climate change is the greatest threat to our common future. We have a very short period of time to tackle the problem before it becomes irreversible and out of control. A lot of progress has been made, but we must now go further, faster and turn targets into real change

...it is business that can exercise the fastest degree of change by seeing the opportunity rather than the threat

First, we must stop wasting energy. A quarter of the UK's carbon emissions come from the home. Our housing stock - the oldest in Europe - is costing us the earth... After transport, heating is the second biggest driver of energy demand in Britain. British Gas research suggests that householders who put in energy efficiency measures cut their gas consumption by 44%. Better insulated buildings will do much of the work for us.

At a time when public finances are under huge strain, we surely do not need to pay celebrities to wax lyrical to mandarins. Unless American comedians can make the Home Office fit for purpose, the taxpayer won't be laughing.