You can read the article for yourself if interested. The point is that the reporter "extracted" key points supporting his conclusion, and reported (presumedly with a straight face):
The two key questions asked were:
"When compared with pre-1800s levels, do you think that mean global temperatures have generally risen, fallen, or remained relatively constant?" Ninety percent said yes.
...
Read the question carefully.
Can you say "tautology?"
"tau*tol*o*gy: 3. Logic a. a compound propositional form all of whose instances are ture, as "A or not A." b. an instance of such a form, as "This candidate will win or will not win." (Random House CD dictionary)
Of course either answer is equally correct, as those who answered "No" may have interpreted the OR as an XOR, and opined that it has done more than one of the possibilities named.
As a side topic, has anyone ever seen or responded to a survey that didn't include such "unanswerable," or otherwise meaningless questions?