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But there are myriad reasons why Europe and China, not the US, have the fastest trains – and in China they are getting faster.

But there are obstacles to widespread use of sustainable aviation fuel, said Pavlenko, the researcher with the International Council on Clean Transportation.

But the cuts won’t be easy, particularly for the shopping side of Amazon’s business. The company this summer released its 2019 sustainability report, revealing that its greenhouse gas emissions rose 15% over the previous year. More than three-quarters of its footprint came from what is called “indirect sources” or scope 3 that include production, use and disposal of Amazon-branded products; capital goods such as building construction, hardware and vehicles; corporate travel; and packaging.

Buyers can easily access related exhibits while watching the live broadcast, he said, adding there are a variety of online communication tools to help buyers and sellers to interact in real time, as well as improve both the efficiency and effectiveness of online negotiations.

But the beachside town now lies in ruins, pummeled by a deadly tsunami that has raised fresh questions about disaster preparedness and the future of a multibilliondollar push to replicate Bali's success across the Southeast Asian archipelago.