Reuters: Japan is still undecided whether to adopt a cap-and-trade system which binds industry to mandatory greenhouse gas emissions limits, as a Japan-hosted July meeting of Group of Eight leaders nears. Prime Minister Yasuo Fukuda may be keeping his powder dry, to unveil a set of new climate measures at that G8 meet, as countries negotiate a climate pact to succeed the Kyoto Protocol. Japan, the world’s fifth biggest emitter, has said it will, along with other major emitters, agree to …