Think before you click – and three other ways to reduce your digital carbon footprint

It's been called "the largest coal-powered machine on Earth" - and most of us use it countless times a day. The internet and its associated digital industry are estimated to produce about the same emissions annually as aviation. But we barely think about pollution while snapping 16 duplicate photos of our pets, which are immediately uploaded to the cloud. This is the invisible downside to our online lives: the data we produce is stored and processed in giant energy-guzzling datacentres dotted all over the world. Over the past year I've delved into digital waste and learned key ways we can…