The way the moon effects the tides on earth is the gravity between the earth and moon and I would go into more detail but that would take all day
I think the two sources would be drip irrigation which is like a river, lake, groundwater, etc... The second source could be is making a new irragation system that could deliver water faster.
Deindustrialisation which resulted in less factories as companies shifted their manufacturing operations to countries of lower production cost. This results in less pollution to the environment as the industrial scene is replaced by the growing services sector. The increasing emphasis on human development and henceforth the sustainability of development is also a contributing factor.
