Some things I know, many things I don't
I honestly do not know (meaning with scientific certainty) where the climate is heading, and what is causing such changes as are observed (and data can be confusing). I do know that climate was very much different in the past, both much warmer (for much of the fossil record), and much colder (pleistocene, anybody?). I know that solar activity plays a role, and I know that many other factors including greenhouse gasses and water vapour are important. I do not know all the precise mechanisms or which factors are most important (let alone which weight to assign to each factor). This is actually why this field of science is scientifically interesting. Unknowns are interesting, knowns are comparatively boring.
Despite all this uncertainty about the degree to which mankind may be contributing to change, I do know one simple fact: it is foolish to squander limited resources. Using up fossil fuels in wasteful ways, when oil and the like are also needed to manufacture more durable products, is not tenable in the long run. I agree we cannot suddenly all go back to the caves and shiver in the cold, but we can and should find alternatives, not so much to reduce pollution or CO2 emission (which in itself may make sense), but simply because at some point fossil fuels will run out. As these fuels become more expensive, it just makes (very selfish, perhaps) economic sense to be less wasteful.
I am open to suggestions about what the best alternatives are, and where we can make savings in use
Just my tuppence worth