The issue is climate change, not global warming.
I don’t think anyone who is in close contact with nature can deny the negative impact of our negligence.
From the comments here, it’s as if the issue were purely political.
Some people see the world as us and them, them in this case being the Pope and scientific research.
Given that the latter two seek the truth, where does this put the OP, and those who share his/her belief.
And, the key world is belief, an idea held by the person, which can sometimes be merely a wish.
The belief is that we are not in the process of making this planet uninhabitable by future generations.
Revealed truth tells us we are meant to tend to this garden. I guess believing that everything is great and that we are not making a mess of this gets you off the hook for not doing anything about it. Rather than fixing what is already wrong with how we are managing things individually and collectively, by ignoring it, you become part of the problem friends. And, this is likely to leave you out of the solution.
I know people who were in the fur industry; anyone see fur coats any more? Cars are turning electric and coal better find a way to become clean, or it will be on the way out, taking those jobs with it. It’s always better to be aware of what’s going on. Any political battles won, will be short-lived against the rising tide of change. So, no it’s not reasonable to be a “global warming skeptic” because it puts you out of touch and unable to act effectively.