You are currently using 211 MB (3%) of your 6400 MBMore than 6.3 Gigabytes for my very own personal usage, this possibly multiplied by millions of other happy Gmail users worldwide enjoying the same service!
Being increasingly aware of the energy need of computing confirmed by the seemingly odd fact that server farms of Google1/Google2/Yahoo/Microsoft are often located strategically near electrical power plants, I would not be surprised to soon witness the birth of specific CO2 footprint calculated for internet services. How much CO2 does my Gmail account generates yearly? I would be interested to know, wouldn't you?
This brings me back to that old saying: Nothing is free