Yes, it is. And I find amusing people who use the scientifically foolish argument "we're in an Ice Age, so no global warming" without realising that mean temperatures should decrease or maintain stable and glaciers should increase rather than melt. It backfires.

Honestly, arguing whether global warming exists is like arguing whether the ocean has a bottom. It's a fact. What some people may question, whether genuinely curious or out of stubborn ignorance, is whether the anthropic influence is significant.