The problem is the plastic in the river and the ocean. It is very bad for the environment. Fish eat the plastic, and people eat the plastic. The solution - a Nano- bot and a Humungous-bot. The Nano-bot sucks microplastic and the Humungous-bot sucks bigger plastic, like bottles and straws, from our waters. The bots work together and are charged by a turbine that uses the ocean movements.