Broadband offers unique opportunities to spearhead the transition to a carbon-constrained world. But to reach its full potential, broadband needs to be a component of climate change strategy, backed up with strong policies in support of economy-wide emissions reductions. In many countries, it is this integrated regulatory framework that is the crucial missing link to achieve carbon reduction commitments through the use of broadband networks, services and applications. For broadband to deliver on its climate change reduction potential, a range of obstacles and challenges need to be overcome.