Hindu: The BASIC group of large developing nations — India, China, Brazil and South Africa — on Monday intensified their efforts to win the crucial support of small island States on the climate change debate ahead of the year-end U.N. summit at Cancun in Mexico. Their attempts, however, faced hurdles, with persistent differences on emission reduction targets between the Association of Small Island States (AOSIS) and the BASIC countries. The AOSIS has emerged as a key voice in the …