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Microsoft co-founder Bill Gates said the U.S. government cannot rely solely on existing technology to reach net zero emissions.
An expert featured at the White House and State Department's climate change summit made a similar statement, saying that about half of the emissions reductions needed will come from technology that hasn't been developed yet.
"Climate change is an incredibly complex issue, and using just today's technologies won't allow us to meet our ambitious goals," Gates said at the Leaders Summit on Climate organized by the White House and the State Department Friday. "The reason is that almost all of our zero-carbon technologies are more expensive than their fossil fuel counterparts.
