Cosmic rays blamed for global warming

I have said many times that we are not totally responsible for the climate changing. After all, how can our industrial activities change the temps on our neighbouring planets?
I have now come across an article where Danish Weather scientist Mr. Henrik Svensmark said

the number of cosmic rays hitting the Earth changes with the magnetic activity around the Sun. During high periods of activity, fewer cosmic rays hit the Earth and so there are less clouds formed, resulting in warming.

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