Ban opened the session with a reference to the historic Earth Summit held in Rio 20 years ago, which spawned UN conventions on climate change, biodiversity and desertification, as well as the Agenda 21 blueprint for sustainable development. President Mahinda Rajapaksa today blamed developed Nations for the environment crisis, the President’s office said.Addressing the Rio+20 United Nations Conference on Sustainable Development in Brazil, the President said that global warming is a concern to island nations. On Sri Lanka, the President said that the island was on its way towards economic development after ending three decades of terrorism.Earlier the BBC reported that the UN sustainable development summit in Rio de Janeiro formally opened with a warning from UN head Ban Ki-moon that progress on the issue is too slow. He said that developing nations are facing increasing challenges and also it is the developed nations which largely contribute to the environment crisis. The secretary-general told world leaders and other ministers that “words must translate into action”.On the summit’s fringes, international finance institutions launched a $175bn fund to boost sustainable transport.And the UK government announced that major businesses will have to report their carbon emissions from next year. President Mahinda Rajapaksa also said that people wish to see the concept of sustainable development become a reality.