The deep freeze gripping much of the US has been blamed on a polar vortex. Here's what that means.
from BBC News - World https://bbc.in/2Sex5LW
Thursday, 31 January 2019
Home »
bbc news
,
bbc world
,
latest news
,
trend news
,
world news
» Polar vortex: What is it and how does it happen?
0 comments:
Post a Comment