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WASHINGTON — The Obama administration and some Senate Democrats expressed fresh urgency on Tuesday about the need to address climate change and refashion the nation's energy economy.
But they faced determined opposition from Republicans, new concerns from some Democrats and reminders of the financial, technological and political hurdles to remaking the way the nation produces and consumes power.
In a Senate hearing on a new climate change and energy bill and in coordinated appearances by President Barack Obama and Vice President Joe Biden, the administration promoted measures to cap greenhouse gas emissions and support new means of fueling homes and vehicles with far less carbon dioxide intensity. Obama appeared at a solar energy installation in Florida and Biden at a Delaware auto plant that will produce electric vehicles, talking about the potential of alternative energy to create jobs.
On Capitol Hill, five senior administration officials appeared before the Senate Environment and Public Works Committee to speak in support of a bill to address global warming and encourage development of non-polluting energy sources. They said such measures were important not only to the environment but to the nation's economic competitiveness.
"When the starting gun sounded on the clean energy race, the United States stumbled," Energy Secretary Steven Chu told the Senate panel, saying that spending on green energy technology in China and several European nations was far outstripping that of the United States. "But I remain confident that we can make up the ground."
The climate change measure aims to cap emissions of the gases linked to the warming of the planet by setting up a program under which industries can buy and sell emissions permits.
Republicans on the committee dismissed the bill as an overly complex one that will harm the economy, kill jobs and favor some parts of the country over others.
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