Reuters: Japan on Wednesday unveiled plans for only marginally deeper greenhouse gas cuts over the coming decade than its current UN commitments, a step green groups say threatens to deal a blow to global climate talks. The world’s fifth-biggest greenhouse gas emitter has been under huge pressure from developing nations to opt for deep 2020 greenhouse gas reductions to ensure a strong outcome from talks for a new global climate pact at the end of the year. But Prime Minister Taro Aso, …