The Bad thing is that the Internet uses Tons of Energy.
Estimates on what are the exact numbers are very difficult to make, but there are studies that have made well educated guesses. One is that right now 81% of the electricity consumption is accounted for by Consumers (by Cisco).
Also, it is estimated that in 2030 21% of global electricity consumption is used by information and communication technology. At worst, it could rise up to 50%. What is not an estimate, is that energy consumption of digital devices and infrastructure is rising at 7% a year.
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A while ago, there I was ignorantly happy. Thinking I was doing a good job. I had done tests online and they agreed with me, my Environmental Impact was small. I avoided flying, I did not own a car. To get to places I used public transport or cycled. And my diet was mostly vegan. My environmental impact was where it should be. Or was it?
What I was doing a lot was watching youtube and streaming video and music. While working on the computer, on the background I listened to music, podcast or whatever.
Then, one day I thought of a question: how much energy is used when I stream? My computer uses some and that is quite easy to measure, but how much is used to get the content to my screen? So, I do what I always do in such situations, I turned to Google. It turns out that one bad thing about the internet is, that it uses massive amounts of energy. And the negative environmental impact of internet as a whole is rising rapidly.
This realization made me research the Environmental Impact of Internet. I had been in the internet business for a few decades and never questioned it until now. The research is an ongoing process and the results are posted here on this site.