I can point you to two legitimate climate scientists who in some sense deny climate change. They work on the satellite temperature record, which very clearly shows the increasing temperature:
Spencer's view is that there is a natural climate change going on that just happens to coincide exactly with increasing greenhouse gases. Christy believes that climate change is real and partly anthropogenic but that it's just not going to be all that bad.
If your friends think that it's not happening, you can point them at the data that these two gather:
They'd disagree with your friends that humans are not involved at all. But your friends could switch to the position that climate change just doesn't matter and it'll all be fine.
I had a look at those two and they are both strongly religious and I guess of the view that god put the resources there for mankind to make use of. Which I guess is a view, although I'm not religious personally.
https://en.wikipedia.org/wiki/John_Christy https://en.wikipedia.org/wiki/Roy_Spencer_(meteorologist)
Spencer's view is that there is a natural climate change going on that just happens to coincide exactly with increasing greenhouse gases. Christy believes that climate change is real and partly anthropogenic but that it's just not going to be all that bad.
If your friends think that it's not happening, you can point them at the data that these two gather:
https://www.nsstc.uah.edu/climate/
They'd disagree with your friends that humans are not involved at all. But your friends could switch to the position that climate change just doesn't matter and it'll all be fine.