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Amazon’s fulfillment centers — there are more than 70 across the U.S. and nearly 150 around the world — are a far cry from Amazon’s first warehouse, where a small staff packaged and mailed out books and founder Jeff Bezos had to be prodded to buy packing tables, as he tells the story.

American company Litter Robot brought an auto-cleaning litter box to the fair, which reduces the frequency of cleaning a litter box to once every few weeks.

Ambient air pollution affects urban and rural areas. Major sources include inefficient energy use in households, industry, the agriculture and transport sectors, and coal-fired power plants. In some areas, sand and desert dust, waste burning and deforestation are additional sources of air pollution. Air quality can also be influenced by natural elements such as geographical, meteorological and seasonal factors.

Among popular attractions, those in northwestern and southwestern provinces that usually take longer to travel to, such as Xi'an in Shaanxi province and Dali and Lijiang in Yunnan province, were preferred by travelers.

Among the targets announced Monday, the government aims to reduce the rural poverty population by over 10 million, reduce air pollutants in key areas, while working to forestall and defuse local government debt risk.