How does mercury poisoning affect humans?

Mercury poisons and affects the health of humans and animals alike. Poisons the water and other organic life. I would need a book to describe the long term and harmful effects mercury has had to...

Pollution, Mining Groundwater, and Timber Harvest are the three main ways humans affect watersheds.

Well first of all, without a tongue you couldn't talk. And second of all, if you didn't have a tongue,you couldn't eat anything.

gives a control to test. it helps us have resources such as the forest for wood supplies, water, plants, and animals they provide to help us survive in this planet. it affects us because that is what...

Because it is to close to the sun, and lack of nitrogen and oxygen which we need to survive.