This is countered in the article.

"Yet throughout this period, the actual share of electricity use accounted for by the IT sector has hovered between 1 and 2 per cent, accounting for less than 1 per cent of global greenhouse gas emissions."

But presumably the total use of energy has been going up, so while the relative percentage might be the same, I doubt very much that the absolute quantity of GWhr/year has stayed the same.

It's bad faith to talk about greenhouse gas emissions without taking into account the indirect contributions. When you use a computer, you cannot only account for the electricity that goes into the computer that is sitting on your desk.

You have to account for all the energy that went into extracting the materials from the ground, building the electronics, shipping it accross the world, and then the electricity to operate it.