Sea change for climate: U.S. Democratic presidential candidate Illinois Senator Barack Obama addresses a policy speech in Toledo, Ohio on Monday.

Credit: AFP

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WASHINGTON DC: Little separates Barack Obama and John McCain on the issue of global warming. That means victory for either of them in the November 4 elections will signal a sea change in the way the U.S. addresses the issue.

Both agree that climate change results from human activity. Both favour cutting U.S. emissions by 2020 and deepening them by 2050. Both want a cap-and-trade system to achieve this – something President George W. Bush has bitterly opposed.

More similarities

"In my opinion, there are more similarities than differences," said Eileen Claussen, president of the Pew Centre on Global Climate Change, an independent think tank in Washington DC.

"Whoever will be in the White House in January, it will be a different world on the climate front," she said. "They all accept the science and both have the same idea on what kind of program to have."

McCain's position on climate change stems from the Climate Stewardship Acts, which co-sponsored with fellow U.S. senator Joseph Lieberman and which Obama – also a senator – supported before they failed to get enough votes to clear the Senate.

Notwithstanding their common ground on principles, the rivals do differ on details.

Nuclear option

Obama, the Democratic hopeful, wants greenhouse gas emissions to be slashed by 80 per cent within 50 years. McCain, in the Republican camp, prefers 60 to 65 per cent. Obama also wants to see 25 per cent of U.S. electricity needs met by renewable sources by 2025 – a target that McCain opposes.

Finally, McCain is more gung-ho on offshore oil drilling – a feeling shared by his running mate, Alaska Governor Sarah Palin – and supports the construction of 45 new nuclear power stations by 2030.

Nuclear today accounts for 20 per cent of U.S. electricity output. But since the 1978 accident at the Three Mile Island facility in Pennsylvania, no new nuclear power stations have been built. Though not opposed to nuclear energy, Obama has reservations on how to deal with radioactive waste.