"These habitats are exceptionally rare, rich in biodiversity, support unique flora and fauna, and are impossible to recreate or replace," he said.
"Launching radioactive material through the Earth's atmosphere brings safety concerns. You have to have a special license to do that, but it is not insurmountable," says Dr Simeon Barber, planetary science specialist at the Open University.
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引爆股价的不是业绩反转，而是一款被股民戏称为 “阴伟达” 的新药。
More on this story:'No final decisions' yet on vehicle phase-out plans