NUSSING!

She's four or five years old. Her enthusiastic "NOTHING!" isn't accurate.

You probably have staff on salary. 

You get someone on staff to translate it, publish on the Internet or similar, get someone to go over local laws and add a little information like "you can do x, y and z outside city limits but not inside city limits" and help them keep it legal.

That's not actually FREE, but you are already paying them. Tasking them with implementing this doesn't involve cutting a check or getting a committee to approve the expenditure.

You CAN spend money on it. You can also just have some modest upfront costs for translation and publication of the information and let the people decide what they want to do.

One benefit of a grass roots start is seeing which things locals jump on before pouring money into unproven infrastructure.

What gets popular locally will vary depending on local climate and lifestyle and other factors.

If there's substantial rain, locals may gravitate towards water catchment systems.

In deserts, that probably won't make anyone's radar and they will instead do stuff like install gabions to turn dry stream beds into intermittent streams that may flow more than half the year.

A gabion is a permeable wall made of rock enclosed in wire mesh. It means "bird cage" because the wire mesh looks a bit like a bird cage.

It looks sort of like a dam but instead of stopping water flow, it can be used to SLOW water enough to let it seep into the ground and then part of your stream flow is underground and this limits evaporation and establishes a local water supply in the desert.

If you want to install gabions,  read this:

https://www.eclogiselle.com/2025/11/avoiding-accidents-and-reducing-damage.html