Technology 160 billion emails are sent daily, 97% of them are spam. Spam generates 33bn KWt-hours of energy every year, enough to power 2.4 million homes, producing 17 million tons of CO2. 9 out of every 1,000 computers are invected with spam. Spammer get 1 response to every 12 million emails they send (yet it still makes them a small profit). There are some 1 billion computers in use. There are some 2 billion TV sets in use. There are some 3 billion cell phones in use. About 3 million cell phones are sold every day. The first known cell phone virus, Cabir.A, appeared in 2004. Since 2008, video games have outsold movie DVDs. About 1.6 billion people connect to the internet, 450 million of them speak English. See list of internet languages. Google indexed it's 1 trillionth unique URL on July 25, 2008. That is thought to be about 20% of all the pages on the Internet but a high percentage of the World Wide Web (the public Internet). One google search produces about 0.2g of CO2. But since you hardly get an answer from one search, a typical search sension produces about the same amount of CO2 as does boiling a kettle. Google handles about 1 billion search queries per day, releasing some 200 tons of CO2 per day. The average US household uses 10.6 megawatt-hours (MWh) electricity per year. Google uses an estimated 15 billion kWh of electricity per year, more than most countries. However, google generates a lot of their own power with their solar panels. The first public cell phone call was made on April 3, 1973 by Martin Cooper. The Motorola DynaTAC 8000X was the first cell phone sold in the US; launched on April 11, 1984, it was designed by Rudy Krolopp and weighed 2 pounds. About 20% of the videos on YouTube is music related. 10 hours of video viewing is uploaded every minute on YouTube. People view 15 billion videos online every month. On average, US onliners view 100 videos per month each. Flickr hosts some 3 billion photographs, FaceBook hosts more than 10 billion.