Replacing Fossil Fuels in US Could Cost $4.7 Trillion

　　A new study has found that replacing fossil fuel power systems in the United States could cost up to $4.7 trillion.

　　The study was released by energy research company Wood Mackenzie. The company is based in Edinburgh, Scotland.

　　The report includes one of the first independent cost estimates for completely ending power sources that produce carbon pollution.

　　Some American politicians support the complete replacement of all fossil fuel-based energy sources in the United States with zero carbon systems. The study estimates this could cost at least $4.7 trillion and could present major economic and social difficulties. The total would amount to about $35,000 per U.S. household, the study found.

　　Several Democratic presidential candidates have proposed their own plans to reach the goal of zero carbon emissions. Former Vice President Joe Biden has said his plan would cost about $1.7 trillion. Another candidate, Beto O’Rourke, has proposed a $5-trillion plan to get to zero emissions.

　　Democratic U.S. House member Alexandria Ocasio-Cortez, who represents New York, helped create a “Green New Deal” proposal that seeks to solve several major environmental issues. It has been estimated to cost around $10 trillion.

　　Such ideas seek to appeal to a growing sense of urgency about climate change on both sides of the political divide. But many Republicans, including President Donald Trump, have criticized the Democratic proposals as being costly and impossible to carry out. They say the plans would harm the economy.

　　A public opinion study released last week by Reuters/Ipsos showed that most Americans support “aggressive” climate change action like that proposed by Democrats. But that support falls sharply if individuals sense the plans would personally cost them.

　　Wood Mackenzie’s report centers only on the costs to replace fossil fuel sources used to generate power. One of the main fossil fuel sources for U.S. power plants is coal. Coal plants give off air pollutants and heat-trapping gases that have been linked to climate change.

　　The study said the change from fossil fuels to green sources would require “a complete redesign” of the current power system.

　　It estimated that 1,600 gigawatts of wind and solar capacity would have to be added, at a cost of around $1.5 trillion. That is more than 11 times the nation’s current wind and solar capacity. Even though the costs of wind and solar have been dropping, a sharp increase in demand could drive prices up, the study noted.

　　The report estimated that more than 320,000 kilometers of electrical wires would have to be added to carry wind and solar energy from rural areas to major cities. The estimated cost for that effort would be about $700 billion.

　　The study noted that major costs could be reduced if the process of completely moving away from fossil fuel sources took place over a longer period of time.

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