Did you know that digital services are thought to produce more carbon emissions than the aviation industry? And if the internet was a country it would be the seventh biggest polluter in the world. It’s shocking, isn’t it!? The cloud isn’t as fluffy and harmless as we’re led to believe… Digital technologies provide wonderful opportunities to reach and engage others, often in ways that aren’t possible using offline methods. But digital does have significant hidden environmental costs, which many in the tech industry aren’t conscious of. In this talk, we’ll discuss how digital technologies cause pollution and how technologists can take action to improve the sustainability of the tech they build, manage and use. We’ll also go beyond digital carbon emissions and get into some of the deeper issues around sustainability and climate justice.