Independent: More than 100 world leaders, but not America’s Barack Obama or Britain’s David Cameron, gathered in Rio de Janeiro yesterday for a three-day UN summit on sustainable development – the formula for bringing millions of people out of poverty without trashing the environment.
The gathering at “Rio Plus 20” marks the 20th anniversary of the so-called “Earth Summit” in Rio in June 1992, regarded as one of the most influential environmental gatherings ever, not least for the two UN treaties it saw signed…