By Ben Tavener, Senior Contributing Reporter
RIO DE JANEIRO, BRAZIL – As Rio+20, the UN Conference on Sustainable Development, enters the final 24 hours of its three-day High-Level Summit the world eagerly awaits news of the agreements reached or torn up by the 193 participating UN member nations. At the same time in Rio security has been tightened further as thousands of people take part in a number of different protests . . .