Every tweet will be read by 131 followers - requiring arround 2 seconds each. You need arround 30 seconds to write one tweet - you post one every 208.52 hours (calculated out of your last 20 tweets) or 42 posts per year. Requiring arround 3 hours a computer turned on. A standard computer consums arround 250W per hour. 1 KWh causes an average of 0.59kg CO2 - or 1.14 pounds
Making for the user achute:
1kg / 1lbs of CO2 yearly for twittering!
Please: Don't be shocked now. Continue to twitter and ask your social network what you might do to save energy,plant a tree, support local activities...
Spread your result via Twitter - show that you care.
or link results via:
http://h3o.de/QE1KDgq
or
compare to driving a car or
Check how long a single tree needs to convert back to oxygen.