Human activities like polluting via pouring chemicals down the drain, not cleaning up oil spills, using and then littering with single use plastic, releasing balloons, drinking in public and littering the cans or bottles (especially while floating the river!),and using confetti eggs (all that paper is litter) are just a few of the things that affect the local watershed and global systems. Improving the health of water systems means making lots of public changes and educating people to make the personal changes they need, like picking up trash and disposing of it properly.