Activists have claimed for years that climate change caused by fossil fuels puts our food supply under grave threat. Ironically, the war against Iran has revealed that lack of access to fossil fuels poses a much greater global food challenge. Today, half of all the calories we consume from proteins, carbs and fats are made possible by the use of artificial fertilizers, derived overwhelmingly from natural gas. Without fossil fuels, half the global population would suffer a severe lack of food.