According to Website Carbon, the internet consumes 416.2TWh of electricity per year, which is more than the entire UK. Also, although the energy needed for writing an email or one internet search is pretty tiny, about 4.1 billion people are now using the internet. Our websites live in data centres, usually, many miles away, so it can be tricky to get a good picture of the carbon emissions involved with keeping a professional online presence. Here, we aim to untangle some of the claims and fears around website carbon.