National Geographic : 2009 Mar
$50 $100 POWER INDUSTRY 1,127 million tons per year RENEWABLE ENERGY 521 OTHER MEASURES 606 BUILDINGS 729 million tons per year OTHER 490 LIGHTING 239 INDUSTRY & WASTE 520 million tons per year OTHER 247 REDUCING DIRECT EMISSIONS 273 FORESTRY & AGRICULTURE 486 million tons per year OTHER 207 FOREST RECOVERY 279 TRANSPORTATION 357 million tons per year OTHER 160 FUEL EFFICIENCY 197 SAVINGS CO REDUCTIONS (IN BILLIONS OF TONS PER YEAR) IMPROVED LIGHT-TRUCK FUEL EFFICIENCY CELLULOSIC BIOFUELS FOR VEHICLES COMBINED HEAT & POWER SYSTEMS 0.5 1.0 1.3 $10 PER TON OF CO REDUCED MORE EFFICIENT ELECTRONICS IN COMMERCIAL BUILDINGS MORE EFFICIENT ELECTRONICS IN RESIDENTIAL BUILDINGS LED LIGHTING IN COMMERCIAL BUILDINGS IMPROVED AUTOMOBILE FUEL EFFICIENCY THE SAVINGS, THE COSTS A CARBON REDUCTION PLAN By investing in new technology or adopting approaches already available, we could cut U.S. greenhouse gas emissions by three billion tons a year, more than offsetting the increases expected by 2030 as our population and economy grow. And the money saved from efficiencies in how we use energy (below) could help pay for improvements in how we generate energy (right). SEAN MCNAUGHTON, NG STAFF SOURCE: MCKINSEY & COMPANY CO AMOUNTS MEASURED IN METRIC TONS KEY SECTORS CUTS THAT SAVE MONEY About 40 percent of possible cuts could come from measures that save billions of dollars a year (below). Most of these savings are found in building improvements, such as more efficient lighting, and transportation improvements like better fuel efficiency.