Are we in danger of 鈥渞unning鈥?out of Selenium?

its for a report..

Not hardly. The earth's crust is about 50 miles thick. Below that is the mantle, which extends all the way to the molten core. The weight of the mantel makes up about 80 percent of the earth's mass. Since the mantle is composed of about 65 percent selenium, we should have ample supplies for several trillion years.

No. Too much Selenium is poisonous anyway.

Definitely!
Check out www.lifeextension.com or .org. Look up selenium when you get there.

I think not. The following is quoted from Wikipedia:

"Selenium is most commonly produced from selenide in many sulfide ores, such as those of copper, silver, or lead. It is obtained as a byproduct of the processing of these ores, from the anode mud of copper refineries and the mud from the lead chambers of sulfuric acid plants. These muds can be processed by a number of means to obtain free selenium.

Natural sources of selenium include certain selenium-rich soils, and selenium that has been bioconcentrated by certain toxic plants such as locoweed. Anthropogenic sources of selenium include coal burning and the mining and smelting of sulfide ores."

This suggests to me that there is pleny of selenium!