'Green broadband' is broadband that is environmentally-friendly. There’s no official definition for it yet, but it includes things like: An entire broadband network being powered by renewable energy, so no harmful emissions are caused by people's internet usage A particular broadband provider uses only electric van fleets, or contributes to carbon offsetting initiatives Full fibre connections — which could also be seen as more 'green', due to their lack of copper cables and more efficient internet speeds