John Kerry | John Kerry Discusses Climate Changes, Science, His Wife's Private Jet & Air Quality On Earth Before Humans "Emissions from the Food System Alone Are Projected to Cause Another Half a Degree of Warming By Mid Century." - Joh
Climate Change | "Agriculture Contributes About 33% of All Emissions of the World. Emissions from the Food System Alone Are Projected to Cause Another Half a Degree of Warming." - John Kerry