By 2050 or so, the world population is expected to reach nine billion, essentially adding two Chinas to the number of people alive today. Those billions will be seeking food, water and other resources on a planet where, scientists say, humans are already shaping climate and the web of life. This is an attempt to examine the efforts to balance human affairs with the planet’s limits.
Oliver Tickell: The PM trumpets his energy deal, yet power firms have escaped a windfall tax for a piffling investment in low-carbon homes
