Global consulting firm McKinsey on Thursday played down suggestions that it had underestimated the costs to farmers and industry of making cuts in carbon emissions.
Governments around the world want to know the cost of low-carbon technologies to choose the cheapest path to fight climate change and overhaul the world's energy system.
McKinsey has devised "cost curves," which compare different low-carbon technologies from insulating homes to trapping carbon emissions from coal plants.
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