WRAPUP 2-Developing nations say Japan blocks climate talks
* Poor nations say Japan backing away from climate goals
* Cancun could collapse if no Kyoto deal - G77 chair
* Japan says wants wider treaty to succeed Kyoto (Adds Japan, United Nations and Brazil)
By Alister Doyle and Timothy Gardner
CANCUN, Mexico, Dec 1 (Reuters) - Developing countries accused Japan on Wednesday of breaking a pledge to extend a U.N. pact for fighting global warming beyond 2012 and said that climate talks in Mexico would fail unless Tokyo backed down.
Japan, among almost 40 industrialized nations curbing greenhouse gas emissions under the United Nations' Kyoto Protocol until 2012, said it will not extend cuts unless other big emitters like the United States and China also join in.
"There will be no successful outcome for Cancun" if Japan sticks to its refusal to extend cuts under Kyoto, said Abdulla Alsaidi, the chair of the group of 77 and China, the main body of developing nations at the two-week talks in Mexico.
Nearly 200 nations are trying to draft a modest package to help avert floods, droughts, heatwaves and rising seas. But Wednesday's tensions show that hurdles remain in building trust between rich and poor countries since the 2009 Copenhagen summit failed to agree a treaty.
"It does not make sense" to extend Kyoto, Hideki Minamikawa, a deputy Japanese environment minister, told a news conference. He said a broader deal was needed as Kyoto countries now account for only 27 percent of heat-trapping emissions. Continued...