LE BOURGET, France: Zimbabwean President Robert Mugabe lashed out at "miserly" developed nations at the UN climate summit Monday, accusing them of trying to shift the burden for curbing carbon emissions onto poor countries. The elderly firebrand, who has a notoriously sour relationship with the West, said the developed nations were historically responsible for the "precarious climate environment we currently live in." "It is unconscionable that not only are developed countries miserly in providing the means" for developing countries, "but also want inordinately to burden us with cleaning up the mess they themselves have created," he told the gathering. Mugabe was among 150-plus heads of state and government attending the opening one-day summit of a two-week conference tasked with crafting the first-ever truly universal climate pact. A key disagreement between rich and developing nations at the talks revolves around who should be doing what to curb climate-altering emissions from burning fossil fuels, and who should pay. Mugabe said African countries were not to blame for climate change and had more at risk, as they did not have the money for shoring up defences against impacts such as droughts and rising seas. "We cannot and we will not assume more obligations," he said. "Doing so will dent our development aspirations, and in particular our efforts to eradicate poverty." Meanwhile, a new Chinese government report raises the alarm over rising sea levels caused by climate change which could potentially threaten the country’s developed eastern coast, according to state media and the New York Times. The release of the official report, now in its third edition, came shortly before the UN Conference of Parties (COP21) summit, which began on Monday with the aim of striking a global deal limiting dangerous climate change. China is the world’s second biggest economy but also its largest polluter, estimated to have released between nine and 10 billion tonnes of carbon dioxide in 2013. Beijing pledged last year to peak carbon dioxide output by "around 2030" -- suggesting at least another decade of growing emissions. The government report said the sea levels off China’s coast have risen 2.9 millimetres annually from 1980 to 2012, according to an article posted on a government-backed website, while glaciers shrank just over 10 percent since the 1970s.