The Tiangong-1 spacecraft has been out of control since September 2016 and could come crashing into Earth between March 30 and April 6, according to experts.
It has the highest chance of crashing into cities along a narrow strip around latitudes of 43 degrees north and south which includes a number of highly populated cities such as New York, Barcelona, Beijing, Chicago, Istanbul, Rome and Toronto.
While most of the satellite will burn up during re-entry, around 10 to 40 percent of it is expected to survive as debris and other parts may contain the dangerous chemical hydrazine.
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