Boaters have a responsibility to the environment. what is one of the three rs?

The three Rs in boaters' responsibility for the environment are: Reduce, Reuse, and Recycle

Since you asked me to explain one of them, I will explain the "reuse"

Boaters have the environmental responsibility to only carry reusable items (such as plates, cups, or silverware) when they're sailing. This will prevent any form of waste from being thrown out into the water.

Population of this city. also, look for information on available public transit, bike-sharing, and other commuting options. use the information you find and write about it promoting alternative transportation

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.