[mountaintimefrm]

Too much calcium carbonate is really detrimental to a wide variety of plants, it causes a condition called iron chlorosis. Basically plants will readily absorb calcium instead of iron (they need iron to do their chemistry for photosynthesis), the result of which is yellowing leaves, poor production, plant death, etc. Spraying massive amounts of calcium carbonate in the atmosphere, if it makes it down to the plants on the ground, sounds like a great way to cause massive forest die offs. Much like sulfur creates acid rain, calcium in the atmosphere would create "basic rain" which is just as much of a problem if you're a plant that requires a fairly narrow range of soil pH.

[gault8121]

So I am having trouble finding this source now, but I have perviously read from the main team researching Calcium Carbonate, SCoPEx (https://scopexac.com/), that the intention is to spray the calcium carbonate high enough in the atmosphere so that it does not float down to the ground but rather dissipates into space. There is a specific height in the atmosphere where it needs to be released, and yes, if it fell to earth, this wouldn't be a viable solution. I can't find where I read this, but this is one component of the current hypothesis.

[mountaintimefrm]

Interesting, I will look into that.