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Among the approvals, three were for first generic drugs, which allow holders a 180-day marketing exclusivity period.

Amazon’s existing Kindle Fire, with a 7-inch screen, sells for 9, with the company reportedly taking a loss on each device in hopes of making up the difference on sales of video, music and Amazon Prime subscriptions.

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.

Amazon’s latest misstep is the abrupt, and still unexplained, shuttering of TenMarks, a math and writing software startup it purchased in 2013 and announced in 2018 it would close the following year, leading to a lot of frustrated, Twittering teachers. That was preceded by the forever-in-beta Amazon Inspire, an educational resource sharing site launched in 2016 but kicked hard in the knees immediately afterward, when a handful of copyrighted items were found posted on it. A year later, the company also lost its K-12 education general manager, who had come to Amazon with the TenMarks acquisition.

Among the new suppliers is China's leading new-energy vehicle manufacturer, BYD, which shifted to mask production to meet the rising demand amid the COVID-19 outbreak. The Shenzhen-based company currently is one of the largest manufacturers of face masks in the world, with a daily capacity of 10 million pieces.