Reuters: The world’s rich nations must make immediate and deep cuts in greenhouse gas emissions or the steeply rising cost of climate change will fall disproportionately on poor countries, the World Bank said on Tuesday. In a major report on the threat of climate change, the Bank’s “World Development Report” said developing countries will bear 75 to 80 percent of the costs of damage caused by climate change and rich countries, the biggest CO2 emitters in the past, have a “moral” obligation to …