A few days ago I quoted Nigel Lawson's stated views on whether carbon dioxide is a greenhouse gas.
While CO2 is indeed a greenhouse gas, increasing concentrations of which may be expected to have (other things being equal) a warming effect, scientists disagree about how large that effect may be.
I don’t deny for a moment that CO2 is a greenhouse gas, but there are so many other factors that affect climate.
Today we have the Chief Secretary to the Treasury opining on Lawson's views:
With [Lawson,] one of the leading exponents of this theory also a noted denier of climate change, it is perhaps no surprise that a cool analysis of the facts and figures clearly shows that they are completely missing the point.