WRAPUP 2-G8 set to clash with poorer states on climate

(For more G8 summit stories, click on [G7/G8]) (Recasts, adds quotes)

* G8 set for climate change showdown with emerging nations

* Poor states unimpressed by G8 plan to curb greenhouse gases

* Two sides may clash over global trade as key talks loom

By Chisa Fujioka and Jeremy Pelofsky

TOYAKO, Japan, July 9 (Reuters) - Big emerging economies including China looked set on Wednesday to clash with G8 rich countries over how to fight global warming.

Papering over deep differences, the G8 said on Tuesday they would work toward a target of at least halving global greenhouse gas emissions by 2050 but emphasised they would not be able to do it alone.

The Group of Eight industrial nations want the leaders of eight fast-growing countries to adopt a "shared vision" of tackling global warming in U.N. negotiations due to conclude in Copenhagen in December 2009.

The U.N.-led talks aim to create a new framework for when the Kyoto Protocol expires in 2012.