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China has been doing something similar to try to slow the spread of the Gobi desert.

And they have more of an incentive to think in the long term and follow through.

Why should they have more of an incentive to think for the long term?

Although I don't like dictatorship, they do have a stable process in doing this through at least 3 administrations.

That is true of the green wall as well.

And in the US plenty of projects (from interstate highway to James Webb telescope) pass through more than three administrations.

Maybe you mean they have more cultural inclination?