Each weapon automatically replenishes its ammunition, but because of the long ammo-reload times, you have to cycle constantly through the weapon list to keep a loaded gun up.
The scientists describe thoughts of God as providing the mind with "important psychological nutrients" that "refuel" our inner resources, much like Gatorade replenishes the body after a long run.
And the best of times this is not: The ill effects of a years-long drought have been exacerbated by the tradition of grazing herd animals indiscriminately over a large region, so that topsoil never replenishes.
The silver lining in these storm clouds is modest: the rainfall replenishes the underground aquifers on which some farmers rely, and the warmer current brings shrimp and lobsters to Peru's coast and provides ideal growing conditions for scallops.