Yeah, my roommate actually said this. I knew it was hopeless then.
I like the new Colder-than-usual-winters-argument you now here.
Ten years ago the warmer winters (El Nino) were the proof.
1. Are we currently in an ice age yes or no?
answer: Yes the Quaternary Ice Age. Which means we are currently in an interglacial period and due to for glaciation soon.
2. CO2 levels for the past 500 million years, are they at currently extremely high or extremely low levels?
answer: extremely low the average CO2 levels for the last 500 million years is over 3000 ppm. CO2 is so low in fact if CO2 drops another 100 ppm all plants stop growing.