What has the Colorado River become an environmental issue?(1 point)%0D%0AResponses%0D%0A%0D%0AOil spills have polluted the river and threatened many species.%0D%0AOil spills have polluted the river and threatened many species.%0D%0A%0D%0AIrrigation has severely reduced the flow of water.%0D%0AIrrigation has severely reduced the flow of water.%0D%0A%0D%0AFrequent flooding threatens endangered habitats in the Rocky Mountains.%0D%0AFrequent flooding threatens endangered habitats in the Rocky Mountains.%0D%0A%0D%0ARiver levels are rising rapidly as a result of climate change.
