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"Calculating that, the Amazon would reach the extraordinary number of 20 billion tons of water in a single day. We call this rios voadores, or 'flying rivers'," said Ana Luiza Tunes, an environmental engineer and water management specialist who founded the Brazilian environmental portal Tunes Ambiental.

"By 2030, we hope to be able to remove the cockpit from the vehicles and to achieve fully autonomous driving," Cheng added.

"China has always made a big play about wanting to do international collaboration," Harvey said.

"China promises a bright future to researchers now, especially in the area of energy storage. The gap between China and the US is smaller and smaller and China has been investing heavily in scientific research," he said.

"By the end of August, Harbin has constructed and renovated 2,654 public toilets in the urban areas," said Tong Xiaoyu, deputy director of the bureau. "Another 78 toilets will be put into operation after construction."