Avatar are real since they pollute. About that, I wanted to make a little update on this calculation made in december by Nick Carr.
We know that second life will upgrade its server farm up to 10.000 units and that, in the first week of march, second life had an average simultaneous users number of about 36.000.
I keep Nick’s assumptions: 120 watts per PC, 200 watts per server + 50 watts per server for air conditioning.
(10,000 x 250 x 24) + (36,000 x 120 x 24) = 163,000 kilowatt-hour (and 4,53 kWh per capita per day). With current figures a second life avatar consumes 1.653 kWh (just like the per capita chinese consumption)