Really- there is plenty of argument about the science. If you want to make a categorical statement like that, there should at least be a citation.
More accurately said, few scientists dispute the CO2 concentration data and few dispute that climate changes and always has for 4 billion years or so. But how much has sea level gone up and how much is due to anthropogenic Co2 is subject to some debate. Even more disturbing is the misuse of science inherent in putting the mantle of science around the Paris treaty. Science does not support or reject a treaty. It does not tell us if it is a good or bad deal.