Worldwide fuel usage in road transportation will double by 2050 without new emissions standards, according to a new study. The report, , says that affordable technology to reduce emissions already exists but that policies still need to be enacted to encourage business and consumers toward more efficient fuel-usage behaviors. The IEA recommends 鈥渇uel taxes, CO2-based vehicle taxes, fuel-economy standards and better product labeling.鈥 Rich European and Asian nations rate highest on the , while the United States receives what鈥檚 basically an 鈥渁verage鈥 rating. Saudi Arabia and Venezuela, two oil-producing nations, rate worst in the index.聽
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