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By David Fogarty and David Stanway SINGAPORE/BEIJING (Reuters) - China's carbon emissions could be nearly 20 percent higher than previously thought, a new analysis of official Chinese data showed on Sunday, suggesting the pace of global climate change could be even faster than currently predicted. China has already overtaken the United States as the world's top greenhouse gas polluter, producing about a quarter of mankind's carbon pollution that scientists say is heating up the planet and triggering more extreme weather. But pinning down an accurate total for China's carbon emissions has long been a challenge because of doubts about the quality of its official energy use data.

By Nina Chestney LONDON (Reuters) - The complete melt of the Greenland ice sheet could occur at lower global temperatures than previously thought, a study in the journal Nature Climate Change showed on Sunday, increasing the threat and severity of a rise in sea level. Substantial melting of land ice could contribute to long-term sea level rise of several meters, potentially threatening the lives of millions of people.

While large-scale efforts to curb greenhouse gases aren't likely to happen in the near future, advocates are thinking of smaller ways to reduce emissions in the meantime. Recently, Vanderbilt University professor Michael Vandenbergh and two others proposed the idea of voluntarily labeling carbon footprints on products in the journal Nature Climate Change . [More]