I found that after reading the actual science papers in the actual science journals, not the reporting of those papers, I could not deny the reality of global warming or that it's being caused by the emissions from our energy and consumer goods (including food) production. They are not page turners or great entertainment, but very well researched and it's quite amazing how well the climate system is becoming understood.
Also be mindful of confirmation bias, where you can take anecdotal accounts that fit your preconceptions and confirm your ideas while ignoring evidence to the contrary, the he scientific method was designed to overcome such biases. If the global warming deniers used the scientific method to build a body of evidence better than the body of evidence now built for global, then great, we could all go and burn a forest and have a coal burning party.
I still sometimes wonder if the best thing long term for the planet and the reduction of suffering wouldn't be to just keep going as we are until the world is mostly uninhabitable for humans and let nature rebuild again like after the last big asteroid strike. Then again I have some pretty dark ideas that I don't think anyone should have to follow.