It gets worse, as the advisory doesn't even mention to delete emails/pictures from the cloud, so the people who are likely to listen to these kinds of advices are also the people who are the least likely to understand why this is a bad idea and will delete their local stuff. (And that is ignoring that opening your email/gallery to delete stuff costs more than keeping it in storage where it isn't accessed).
"HOW TO SAVE WATER AT HOME
- Install a rain butt [hehehe] to collect rainwater to use in the garden.
... [other advice removed] - Delete old emails and pictures as data centres require vast amounts of water to cool their systems."