Asian Development Bank today said that a global failure to respond to climate changes could result in about 8.7 per cent economic loss in India's Gross Domestic Product by the year 2100.The Manila-based multilateral funding agency said in a report titled, Assessing the Costs of Climate Change and Adaptation in South Asia, predicts that Bangladesh, Bhutan, India, Maldives, Nepal and Sri Lanka will see an average annual economic loss of 1.8 per cent of their collective GDP by 2050. It will rise sharply to 8.8 per cent by 2100, the report added. The report also said changes in rainfall patterns are likely to benefit rice output in most north-eastern states in India. However, the southern states in the country could see annual yields decline by 5 per cent in 2030s, 14.5 per cent in 2050s, and 17 per cent in 2080s.