It is the greatest environmental hazard of the age. Nothing focuses our concern for the future more, divides rich and poor, exercises science, business, politicians, old and young. It is an existential threat, a generational battle. All political and financial resources must be concentrated on stopping climate change.
But now that governments have signed up to the unambitious Paris climate agreement and pledged to try to limit greenhouse gas emissions, we must ask whether we have lost sight of everything else. Is the environment just about carbon and parts per million of gases in the atmosphere? What about the environment that we can smell, see and touch today?