Venezuela's oil is also of poorer quality than its Saudi equivalent. Its sour, heavy crude is difficult to extract and refine, while its high sulphur content makes it corrosive to pipelines. A resurgence of Venezuela's industry could pose problems for Canada, which produces similarly viscous oil and exports much of it to the US, but analysts reckon the risk is minor.
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"Space regulations don't cover the new problems emerging - interference with astronomical observations, risk of collision in orbit, risk of stuff falling on our heads, and now it is becoming clear, atmospheric pollution," says Andy Lawrence, Professor of Astronomy at the University of Edinburgh.
本报北京2月26日电 (记者彭波)十四届全国人大常委会第二十一次会议26日分组审议拟提请十四届全国人大四次会议审议的全国人大常委会工作报告稿。,更多细节参见safew官方版本下载
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