Reuters: Japan, under pressure to find other incentives than government spending to reduce greenhouse gas emissions, approved an October start for the trial trading of carbon dioxide, the main gas blamed for global warming. “We’ll set down rules in September on how to take part (in a trial carbon trading scheme) and in October we’d like to get started,” Hiroshi Kamagata, director for the cabinet secretariat at the Cabinet Office, said at a briefing on Tuesday. Tuesday’s …