"Since then, the United States has turned ambition into action." On the sidelines of the conference, the United States also unveiled new measures to curb emissions of the powerful greenhouse gas methane from oil and gas operations. That awkward coincidence underscores one of COP28's most contentious questions: Can the world's response to climate change involve continuing use of fossil fuels? Harris told the conference that the United States supports phasing out of "unabated coal" use, but she did not mention other fossil fuels. "We're in a context in which we need to reduce production of fossil fuels and ... we need to be on a path of lower consumption.

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Persons: Kamala Harris, Joe Biden, Harris, haven't, aren't, Catherine Abreu, John Podesta, Richard Valdmanis, Valerie Volcovici, Sarah McFarlane, Simon Jessop, Katy Daigle, Kevin Liffey, Diane Craft Organizations: Climate Fund, OPEC, United, UAE, Saturday, Exxon Mobil, Saudi Arabia's Aramco, Oil, Climate Initiative, Reuters, Thomson Locations: DUBAI, United States, Dubai, COP26, America, China, Texas, New Mexico, United Arab Emirates, U.S, Saudi, Ukraine