[anonporridge]

I think the concern is downstream effects negative to areas and people far away.

Like how the Sahara feeds the Amazon rainforest. https://www.nasa.gov/centers-and-facilities/goddard/nasa-sat...

i.e. greening your land might lead to browning mine.

[micromacrofoot]

ah right, but they're not looking to reduce the sahara, but stop it... so in theory they're avoiding any new downstream effects? though I guess it's possible that some necessary process results in the sahara's growth? that's not my understanding though, part of the reason it grows is due to surrounding areas becoming more susceptible to desertification through agriculture