Churchill smoked cigars everyday. I highly doubt he gives a sh*t about his smoke affecting the environment.
See, you and I probably know more about Churchill than his pathetic, liberally-twisted grandson.
I can see explaining this to Churchill:
SCIENTIST: ...So, sir, if we don’t cut down on our coal and oil consumption by 1965, there will be a buildup of carbon dioxide that is going to cause global temperatures and sea levels to rise resulting in the extinction of all species including man.
CHURCHILL: Um...that serious? Really? Er, how much will it cost to fix the problem?
SCIENTIST: We estimate it will cost a few trillion pounds, £5,505,014,627 Pounds or $7,594,167,679 American dollars to be exact.
CHURCHILL: What! All that? What proof do we have of this problem? Will I have to stop smoking cigars or driving cars? Who makes these claims?
SCIENTIST: Well, we have a lot of scientists who are being paid by the government who are trying to make their case, but we think this is what it will cost. We estimated what temperatures were hundreds of centuries ago, and have been working on this for some time. I know that back in 1920, when we first became aware of the issue, we thought the problem would be here by 1940, but our calculations were wrong. So we changed the calculations to get the correct numbers, which tell us that it will happen in 1965 now, for sure...
CHURCHILL: Wait. You have no real proof? (buzzes secretary) ELIAZABETH! ELIZABETH! DID YOU LET THIS CRANK INTO MY OFFICE? WHAT IN THE BLOODY BLAZES DO I PAY YOU FOR?