Carbon Must Rise to $175 a Ton to Halve Emissions

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The price of carbon dioxide must rise to $175 a metric ton in order to halve global emissions by 2050, the head of the International Energy Agency said.

The European emissions trading program, the world’s largest carbon market, isn’t providing a reliable guide on the cost of pollution to promote more investment in renewable energy and other emission-cutting technologies, Nobuo Tanaka, executive director of the Paris-based agency, said in an interview in Singapore today.