Water outweighs Gold.

A friend of mine who lives in Africa and India forwarded me a chain e-mail about the Pascua Lama project.

I researched it and found that the Campaign against the Pascua Lama project in the Andean peaks (between Argentina & Chile) is indeed true -- though the folks at Snopes (where, as a responsible netizen, you should always double-check your chain mail & urban legends) indicate that the chain letter doesn't show the complete picture. I also found the petition site to sign where your signature will be counted, rather than signing the chain e-mail.

Here's more information:
Wikipedia on Pascua Lama.
Snopes' review of the chain letter.
MiningWatch, Canada's Campaign against Barrick Gold's Pascua Lama project
Barrick Gold Corporation's response to the chain mail. They also have a Q&A.
Upon making your own judgment of the case, you can sign the petition against mining (or not).