Map showing drought conditions in the western United States in 2020

Does Less Pollution Mean Less Precipitation?

IIHR researchers Wei Zhang and Gabriele Villarini (IIHR director) have published research linking urban sprawl to an increase in rainfall and flooding during Hurricane Harvey.
A fish passageway lets out water on the lower side of a dam
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Fighting for Fish

Floyd Nagler founded IIHR, then acted as director for 13 years. One of his most important projects was his work on the flow of the Mississippi river.