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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.

Among the attendees were Counsellor of Gansu People's Government Information Office Kang Qing, Minister Counsellor for Culture at the Chinese embassy in Berlin Chen Ping, and former secretary general of the Conference of Ministers for Culture, scholar of Humboldt-Universitat zu Berlin Erich Thies.

Among the consumers who have planned to travel for the first time after the epidemic, 43.5 percent chose to go for a suburban outing, 20 percent for distant tours and 6.9 percent for overseas tours. About 30 percent of the respondents have no travel plans yet.

Among them, companies in the medical devices, pharmaceuticals and automotive sectors saw particularly robust sales.

Amazon’s attempt to?more neatly package up its mobile services should make its already-popular cloud platform a more appealing choice to mobile developers who want to build a cloud backend to their app but balk at the idea of having to sink a lot of time into developing it.