Assuming you can think critically, read for yourself the data and conclusions of the scientific community listed in the following links. If you have any opinions on this topic please send comments to the sources rather than me, I'm just the messenger (please don't shoot me :-).
Neil deGrasse Tyson's view on the subject in this
videoDr. John Christy's view on the subject in this
video,
here and
here. The last link is to a local copy in case the original gets cancelled.
The best video on the subject I could find is
here.