The BMJ’s campaign for divestment from fossil fuels is aimed at health professionals and medical organisations, since divestment is one way of exerting influence on politicians and industry on behalf of our patients and the public. We seek your commitment and invite you to sign our online declaration of intent to divest from fossil fuels (below). We urge you to follow up your commitment by implementing divestment in your personal finances and in the medical organisations that you belong to.