Duolingo Word Completion 2

Over the past couple of years, eventhough the 1 0
as a whole has been warming up,
the upper layer of our oceans have 1 0
cooled down.
While this could be natural, it has many 1 0
worried and confused. Scientists have
been 1 0
about the rising temperatures over the past five decades, but
these new 1 0
tell a different story.
Some speculate that volcanic eruptions have caused this 1 0
, but nobody is certain.
This new 1 0
in the trend has caused many worry-mongers to
come up with a lot of 1 0