I Agree with everything that has been very eloquantly stated on this message board today. Energy cannot be destroyed, but merely converted to other forms. To an untrained mind, i believe it is impossible to pump a closed atmosphere full of a heating agent and not to feel any effects. Let's hope the heating effects aren't exponential, although they could be. I live in London, and to all intents and purposes it's high summer already. I have bought Bougainvilea and other sub tropical creepers this year to grow up the front of the house, i have little doubt they will be successful. I am considering an orange tree. Whilst this is intriguing , like you i fear that my exponential theory is correct and we have dark times ahead.