Just 5 percent of power plants are responsible for 73 percent of the world’s energy sector emissions, and they’re primarily in the global north, a new study published in Environmental Research Letters found. AdvertisementThey mapped plants by their carbon dioxide emissions and identified the top 10 “ worst-of-the-worst” power plants, which are clustered around Europe, East Asia, and India. Though the largest thermal power plant in Europe, its capacity is less than some of its lower-emitting counterparts in other parts of the world, the paper finds. In fact, all ten of the worst global emitters were less efficient than others in their home countries, emitting 28 to 76 percent more per unit of energy generated. Grant and his team used Gini Coefficients—a metric typically used to measure income and health inequality—to find differences between the highest emitters and average per-plant emissions in each country.