This is a statement which was made at a conference on global warming:

‘I can prove that all this fuss about greenhouse gas is nonsense,’ stated the scientist boldly.

‘Every year the global temperature rises slightly and this is followed about five months later by a rise in the amount of carbon dioxide in the atmosphere. Therefore the carbon dioxide cannot be responsible for the rise in temperature.’

Was his logic correct?

No. He was confusing himself by thinking in terms of years (a purely arbitrary measure of time). What was happening was that the carbon dioxide level rose and then, some months later, so did the temperature.