earlier, i spoke with shannon marquez, professor of environmental health sciences at columbia university'sool of public health, and asked why these problems are so common in the united states. >> there are a combination of things happening. aging infrastructure from years of neglect, underfinanced systems, and having to make decisions that are more like band-aid approaches to addressing challenges as opposed to comprehensive rehabilitation. that, coupled with what we are seeing with extreme weather events and climate change, are really putting our water systems in jeopardy. many of these systems were constructed for a capacity that is really outgrown now at this point. john: why the neglect, why the band-aid approach? is it out of sight, out of mind? >> if you think about what it's going to take to overhaul these systems, the amount of finance, the reality is that water utilities are faced with just being able to do what they can. patch the holes as they come, patch the main breaks as they come, and there's not enough resources. it really is going to require federal level efforts. and alth