When you slip into the restroom for a little tinkle, you probably don't realize that you are participating in massive environmental genocide -- but you are. Millions of gallons of water swoosh down the tubes every day, even as water becomes an ever-more precious and limited resource, and the specter of global drought and conflict looms (the U.S. has declared water a "national security issue"). On top of that, more than the equivalent of 9.8 million trees are flushed down the toilet every year, according to Claude Martin of Worldwide Fund for Nature.