It is hard to isolate just one factor as with many things it is probably a combination. Besides if we are overdue for a ice age whats stopping it coming back. It is scientific fact that cities create a heat island effect and changes the local micro climate. We are just learning about climate studies and if we follow the same theme of climate change denial that same line of reasoning would have denied the ozone hole due and the relationship with CFCs and blamed it on something else.

Thanks Victor Chernobieff couldn't have said it better! Noble Prize winner for NON EXISTENCE OF GLOBAL WARMING ALERT, Al Gore ex. USA,VP should be forced to return prize money,etc.give to charity, And,pay back money from his {Fraudulent ponzie scheme "Global Warming" tours, lectures, books, seminars, movies...Hollywood is thrilled with him too. Folks that make living in "make beehive land". Make their living by "PRETENDING TO BE SOMEONE THEY ARE NOT, BELIEVING THEY CHANNEL THE DEAD, OR NOT, FILLING IN THE LIES AS NEEDED- PRETENSE. Unless, they too have drank the cool-aid laced with pretend "Global Warming" spew to get on the "Big Bucks" band wagon. Notice five US Oligarchs that live in the US not necessary born in US, have bought up MOST OF THE "CARBON CREDITS" in the world to sell counties of the world for billions just like they raped US, EU,etc.destroyed Greece, Iceland..world economies through "Economic Terrorism" with "Hedge Funds--Derivatives continues. German chancellor pushed passage of laws "outlawing" these financial instrument from US.Are heading back from the break of what bankrupt countries austerity plan,selling resources [privatize] to US VAULCHERS! President Obama his Democratic controlled Senate-House refused to END these very TOXIC financial instrument that have destroyed the counties of the world's economies, including US!. Oligarchs should be in prison for life! Said five have $500 billions must invest but nothing to buy they have destroyed. Maybe they will come to RF join the ones who sole USSR resonances with insider information paying pennies on a dollar [so-to-speak] still allowed to own companies! Its "travesty of justice."