While some of the investment in railroads (and canals before it, and shipping before that) was going into physical assets of economic value, there were widespread instances of speculation, land "rights" fraud, and straight up fraud without any economic value added.
> It appears that stratospheric aerosol injection, at a moderate intensity, could counter most changes to temperature and precipitation, take effect rapidly, have low direct implementation costs, and be reversible in its direct climatic effects.[2]
That last little bit scares me. Whenever I see "yeah nah we can totally reverse it", all I can imagine is that it's something we'll do carelessly and excessively, with no ability to reverse it within our lifetimes.
