Ophthalmologists and climate change.

It is indisputable that human activities have caused climate change and that, if left unchecked, these activities will lead to worsening of weather extremes including fire, drought, and flood with all their attendant human suffering. Reducing future climate change requires limiting cumulative emissions of CO 2 and other greenhouse gases including methane. We have written this evidence-based perspective to highlight interventions with the largest effect to help the average ophthalmologist make the changes with the highest impact in their day-to-day lives.