However, the entire problem of adressing carbon as a problem, in my opinion, is that I'm not finding much proof that it's a danger to us or the planet - but rather that it's part of the life cycle. The only way carbon is a problem is when there aren't enough trees and plants, but it needs to be much higher than currently tracked to cause that. However, if you want a lower carbon emission the best way seems to be planting forests and plants in great amounts.
I'm not asking this out of arrogance, but rather so I know to tailor [potential future] responses: what is your highest level of education in biology and chemistry?
Carbon is an element. In environmental discussions, carbon is most frequently used to indicate carbon dioxide, a greenhouse gas (e.g. traps heat at a rate higher than air, although lower than water vapour). However, it can also be used to discuss carbon monoxide (a more potent greenhouse gas), methane (CH4; a MUCH more potent greenhouse gas), and a variety of other volatile hydrocarbons (most of which trap heat at high levels). Heat trapped in the atmosphere contributes to alteration in local climate conditions (making it hotter, colder, drier, wetter, etc). The important elemental presence is carbon, due to its unique chemical properties in forming compounds and their stability (which allow them to absorb large amounts of heat for their atomic mass).
All aerobes (that is, organisms that require oxygen to live) give off carbon dioxide as a byproduct of cellular respiration. Anaerobes give off a variety of compounds, including carbon dioxide and volatile organics. A variety of organisms, most notably photosynthetics (plants, algae, etc) use carbon-based molecules to support life. Thus, a balance of sorts has evolved, whereby fixation and release of carbon, oxygen, nitrogen, hydrogen, and sulfur are performed by a variety of different organisms on the planet.
However, humanity, as a byproduct of industrial process, produces massive amounts of carbon-based gases (and others) which cannot be fixated biologically at the rates they are produced. This is altering the chemical composition of our atmosphere. Not to levels unprecedented on Earth, mind you, but to levels which the current biosphere is unable to counteract. Increasing the numbers of photosynthetic organisms sounds like a good prospect until you look at the fixation potential of these organisms and the raw numbers for tonnages of carbon-based elements being released. They don't add up. And while compounds like carbon dioxide have relatively-rapid fixation times, it takes much longer for other greenhouse gases. This is all simple chemistry and biology, and takes into account none of the controversial aspects of "climate change" as a policy item. The simple result is that human activity is releasing greenhouse gases at a rate that exceeds the ability of the biosphere to cope. The net effect remains to be seen, although geological evidence seems to suggest that the Earth's climate has varied widely in the past based on atmospheric composition. Whether human activity is simply accelerating a natural cycle or is actually increasing the magnitude of the effect is unknown (despite the various ideological parties shouting "the science is certain.")
All this is a very long-winded way of saying that planting more plants is not an effective way to address the potential effects of larger and larger quantities of greenhouse gas emission. Even the planet's natural cycles don't balance the equation. The Earth's climate is constantly changing, as is our atmospheric composition. It just happens to be occurring on a geological timescale.
There's a lot more out-of-the-box solutions that have been researched, or just seem to be common sense, but seem to just rust away because of big interests in large industries, such as oil. It's important to expand attention away from trying to search for solutions -within- a box, but allow new technologies to take form in stead.
I hear the claim that industry quashes technological advancement all the time, but I've yet to see a shred of credible evidence. The fact of the matter is that coming up with new alternatives is
hard, and there must be financial incentive to do so. I'm not saying industry can't do better, just that it isn't a simple matter of no interest in alternatives.
The rest of your post seems to be meandering thoughts rather than debatable position worth exploring further.