Cameron not just confused on grammars

Amid all the problems DC is having with grammar schools it is perhaps not so surprising that few have paid attention to the fact that he his spending his half term holiday in Greece. I am assuming he flew which would have bunged a few tonnes of CO2 into the atmosphere. Now, I was under the impression DC had made the environment a priority and he is worried about CO2 emissions.
I know, I know, no doubt he has "offset" these carbon emissions. Well, sorry, but that's just pointless. Whether you believe global warming caused by human activity is happening or not you can agree this. Offsetting is pointless.
The idea of offsetting is basically this: you take a flight, feel guilty, cough up a few quid to some organisation who then buys a tree which as it grows will absorb the CO2 you generated. Fine so far. But what happens if the land that tree is on changes ownership and it is chopped down next year and used as firewood? What happens when everyone decides to offset and we create a world where all useful land is covered in trees and so cannot be used for other things like, erm, food production?
If you believe that CO2 causes climate change you have two choices, try and emit less by modifying your lifestyle (ie not taking the family to Greece) or carrying on as normal and stop lecturing to other people. You cannot have it both ways.