The central message is that carbon is everywhere in different forms, that life would not be possible without it, and this message is conveyed both in a scientific way and poetic way. Good stuff.
However, this movie is also advocating greenwashing, for example when we see the founder of a solar energy company saying ' it's easy, look, solar energy is cheaper than fossil fuels, we don't need fossil fuels anymore ' : yes well guess what solar panels are mainly made using..coal, oil. That's why they are so cheap. The energies we call renewables are actually deeply relying on..fossil fuels.
Another one is when someone in the movies says that his vision of the future is 'using the carbon in the air for energy' instead of fossil fuels. Show me how can do that at large scale, until then I ll consider this greenwashing
Same goes with the carbon capture giga factories. We would need 40 000 + of those. And those are built with metal, construction engines working on fuel etc. Greenwashing once again I'm sorry..
Best thing we can do is try and consume less instead of dreaming of a ultra technologized society because else this will be the end of us.