Answer:
1.draining
2. filling
3.damming
4.dredging
1.Volunteer with your local environmental organizations.
2.Pick up trash; participate in trash clean-up days.
3.Help plant trees or seagrass, or remove invasive vegetation.
4.Don't litter: streets and storm drains empty into rivers and streams that drain into our estuaries.
5.Pick up your pet's waste.
