I wouldn't put too much weight into that number. Studies of energy usage for data transfer vary by over 5 orders of magnitude depending on their assumptions. This paper [1], which is an analysis of 14 different studies, came up with 0.06 kWh/GB in 2015, with energy usage halving every 2 years. Assuming the trend continued, that would put it at less than 0.01 kWh/GB today.
The claim about CO2 emissions for a Google search was also contested at the time and later retracted by the original source [2][3]. Unfortunately, once on the internet, these things just keep getting repeated.