The Lancet commission on Obesity published a report today on the joint pandemics of obesity, undernutrition, and climate change. In the report, the commissioners point to the fact that malnutrition in all its forms, including undernutrition and obesity, is by far the biggest cause of ill-health and premature death globally. Excess body weight affects 2 billion people worldwide, 2 billion people suffer from micronutrient deficiency, and both are expected to be made significantly worse by climate change.