WASHINGTON (AP) - The Obama administration on Monday proposed a new agency to study and report on the changing climate.

Also known as global warming, climate change has drawn widespread concern in recent years as temperatures around the world rise, threatening to harm crops, spread disease, increase sea levels, change storm and drought patterns and cause polar melting.

Commerce Secretary Gary Locke and Jane Lubchenco, head of the National Oceanic and Atmospheric Administration, announced NOAA will set up the new Climate Service to operate in tandem with NOAA's National Weather Service and National Ocean Service.

VIENNA (AP) - Iran moved closer to being able to produce nuclear warheads Monday with formal notification that it will enrich uranium to higher levels, even while insisting that the move was meant only to provide fuel for its research reactor.

Iranian envoy Ali Asghar Soltanieh told The Associated Press that he informed the International Atomic Energy Agency of the decision to enrich at least some of its low-enriched uranium stockpile to 20 percent, considered the threshold value for highly enriched uranium.

Soltanieh, who represents Iran at the Vienna-based IAEA, also said that the U.N. agency's inspectors now overseeing enrichment to low levels would be able to stay on site to fully monitor the process. And he blamed world powers for Iran's decision, asserting that it was their fault that a plan that foresaw Russian and French involvement in supplying the research reactor had failed.

SEOUL, South Korea (AP) - A senior Chinese envoy was in North Korea on Monday on a mission to persuade the reclusive state to rejoin nuclear disarmament talks, reports said, while officials from the two Koreas met in the North to discuss restarting joint tour programs.

Wang Jiarui, a top Communist Party official, will likely meet Monday with North Korean leader Kim Jong Il to discuss the stalled six-party nuclear talks, the South Korean cable network YTN reported, without citing its source.

The mass-circulation Chosun Ilbo newspaper carried a similar report, saying Wang is expected to deliver a message from President Hu Jintao to Kim. The paper, citing an unidentified senior South Korean official, said the North will likely promise during Wang's trip to make progress in denuclearization in return for Chinese economic assistance.