It is deeply pejorative to call someone a 'climate change denier. ' This is because it is a phrase designedly reminiscent of the idea of 'Holocaust Denial. '
If getting our kids out into nature is a search for perfection, or is one more chore, then the belief in perfection and the chore defeats the joy. It's a good thing to learn more about nature in order to share this knowledge with children; it's even better if the adult and child learn about nature together. And it's a lot more fun.