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For most of us, the sun rises in the morning and sets in the evening, and that is the extent of the change that we notice in its appearance.

BEIJING (Reuters) - China's air pollution standards are too lax, a senior environment official said in comments published on Friday, the highest level comment following complaints that authorities are understating the extent of smog that often envelops Beijing. The level of air pollution in the capital varies, depending on winds. But in recent weeks, a cocktail of smokestack emissions, vehicle exhaust, dust and aerosols have blanketed the city in a pungent, beige shroud for days on end, prompting residents to denounce official readings of "slight" pollution as a gross undercount

By Lucas Laursen of Nature magazine Glaciologists and climatologists are racing to correct an error in the latest edition of The Times Comprehensive Atlas of the World, which they say overstates the extent of ice loss in Greenland over the past 12 years. The 13th edition of the atlas was released on 15 September. [More]

Americas fastest-growing companies are also increasingly global. From Canada to New Zealand, see the extent to which Inc. 500 companies are active in specific regions