You don't even need to check anything with sensationalist claims like that. Shit article by a shit author.
Light Pollution in the U.S. alone: 120 terawatt-hours/year
Bitcoin Network: 29.05 terrawatt-hours/year (
Confirmation? Some articles cite 11 Twh/yr ?)
CERN Hadron Collider: 1.3 terrawatt-hours/year
Yeah, let's get the global light pollution levels solved first before we start considering Bitcoin energy consumption a problem...
Assuming a network at 10 Exahash/10,000 Petahash/10 Million Terahash/10 Billion GH/s and an average miner efficiency of .3 Watts per GH then I come up with 26.28 terrawatt-hours/year. That is about the efficiency of an Antminer S7 but the majority of miners are probably S9s or equivalent so that seems really high. .2 Watts per GH/s would still be high but closer to reality considering other power costs such as cooling. That would bring us down to 17.52 terrawatt-hours/year.
10,000,000,000 GH/s X .2 Watts/GH/s X 24hours X 365days = 17,520,000,000 KW/h or 17,520,000 MW/h or 17.52 TW/h
It's all based on your assumptions and of course the article didn't say what assumptions it used.
Thanks for the numbers. I found this link indicating that the world consumption in 2015 was 20,757 TWhr and predict around 28,141 TWhr for 2030, assuming a linear growth it would grow at 492 TWhr per year. That would put 2017 consumption at 20,757 + 492 + 492 = 21,747 TWhr for 2017.
https://www.eea.europa.eu/data-and-maps/figures/world-final-electricity-consumption-by-region-in-the-baseline-scenario-twhSo BTC would have consumed 17/21747 x 100 = 0.12% of the worlds energy.
I have downloaded the hash chart in excel from
https://blockchain.info/charts/hash-rate?timespan=alland then added a polynomial regression to predict the hash rate in one year and also in two years from today.
According to the chart on nov-24-2017 we are looking at 10445729 TH/s x 1000 = 10445729472 GH/s so according to your calculation that would put us at
10445729472 GH/s * 0.2 x 24 x 365 = 18300918034944 kw/hr or 18.3 TW-hr
The polynomial fit for the chart has a 0.9767 correlation coefficient predicting close to 70 TW-hr in 365 days and then 210 TW-hr in 730 days (2yrs) near the begining of 2020.
The world power consumption by the beginning of 2020 would be 21,747 + 492 +492 = 22,731 KW-hr
So BTC would consume 210/22731 * 100 = 0.92%
With the available data there is no way that the BTC electrical consumption could reach the world power by Feb 2020.
Here is the chart I generated for 365 extrapolation:

Here is the chart I generated for 730 day extrapolation.

Finally the hash rate chart from Blockchain.info
