Cant see how anyone can deny climate change and specifically global warming. Perhaps its origin is natural but its quite evident when you consider the hard science that its speed of change is not normal.
Its change on peds. Historically these changes take thousands if not millions of years. We are talking about those changes now in decades.

In reality it really does not matter what the cause is. Its the effects we should be concerned about. If it can be shown which it has been that fossil fuels and industry as a whole is the steroid dealer then we should act on that even if we experience hardship. Whats the alternative?