For what reason has the Colorado River become a major environmental issue?

One or 2 sentences

The Colorado River has become a major environmental issue due to over-allocation of water resources, pollution from agricultural runoff and industrial waste, and the fragmentation of habitats, leading to the decline of several species and the degradation of ecosystems.

The Colorado River has become a major environmental issue due to factors such as overuse and depletion of water resources, the impact of dams and diversions on ecosystems, and the threat of climate change exacerbating water scarcity in the region.

The Colorado River has become a major environmental issue due to factors such as overuse and diversion of its waters, leading to dwindling water levels, ecosystem disruption, and decline in biodiversity.