Correlation does not prove cause and effect. Two events may occur together, but that does not necessarily mean that one causes the other or that they always occur together. Such uncertainty is why scientists often say that more research is needed. Beware of politicians who use calls for more research to stall or prevent policy changes, however. Consider the source of the information, no matter which side of an issue presents it.
People can be vocal without being well informed.
A spokesperson should be able to cite credible scientific sources to support his or her position or to refute an opposing view. Mere opinions don't count. Talk show hosts or opinion polls should not dictate policy. Neither source represents sound science. Views opposing the general consensus on an issue cannot simply be dismissed.