Reuters: The world’s richest countries and those that are developing fastest need to lead the transition to an energy-efficient and low-carbon economy to stave off the worst effects of climate change, science academies from these nations said on Thursday. In a message to the Group of Eight industrialized nations, as well as leaders of fast-growing Brazil, China, India, Mexico and South Africa, the academies from these so-called G8+5 countries said that tackling this environmental challenge …