The whole phenomenon is called "climate change" (so this therefore means breakage is attributed to it), post-industrialization effects are speeding up an already-active process. The difference is, instead of the process taking place over tens of thousands of years, we are having it happen in hundreds. What this means is that communities of populations cannot adapt to the rapid changes in the environment to better survive, so this may cause some endangerment/extinction events in the near future.

Is climate change real? Yes, by literally all scientific evidence.

Does human activity contribute to it in a meaningful way? Again, yes, all the evidence shows this.

Will it become an irreversible problem that could be very dangerous in the future? Again, yes.

Should we invest in long term eco friendly energy sources like making Solar more accessible and efficient? I think so, yes.

Will it kill us all in like a few decades if we don't immediately take all possible action against it. Probably not as there are just over 400 carbon particles per million in the atmosphere, according to NASA. That's literally 0.04% Even assuming ALL OF IT was because of human activity, we would have to create 25 times the pollution that the entire human race has since the industrial age to now just to get to 1%