The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that

They suggest that we should stop polluting for it is causing helpless animals to die in agonizing ways. That is not good for the community. It also makes the air dirty and it is not good to breathe in. I hope i helped. Have a nice day

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

producing or giving rise torelating to or engaged in the production of goods, crops, or other commodities.

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

This would be a true statement