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Amazon’s big surprise: Flying drones will deliver packages to customer doorsteps
Ammonia, composed of hydrogen and nitrogen, is already produced en masse from fossil fuels and exported worldwide to make fertilizer. It maintains a liquid state at around minus 33 C, meaning it is much simpler and cheaper to transport than liquid hydrogen at minus 253 C.

Amazon’s announcement last year came amid public pressure from the group?Amazon Employees for Climate Justice, which urged the company to set more specific goals on climate change.?Bezos said in announcing the pledge?that the company was “done being in the middle of the herd on this issue.”
Among the beneficiaries are companies that have moved production offshore. US President Donald Trump on Thursday visited Illinois and Iowa, the nation's leading soybean-producing states. While Trump said his use of tariffs and threats of tariffs have brought countries to the negotiating table, US farm groups are against it.
Amazon’s rapid expansion in its hometown comes amid unprecedented of growth for the company worldwide. Amazon?last month reported that it has surpassed 341,000 employees globally, an increase of 110,000 in just the past year, not including temporary or seasonal staff. The company?employs 40,000 people in Washington state, including about 25,000 people at its Seattle headquarters.
来源:资阳报