Uhhh...let's see...well since CO2 is a greenhouse gas (even though greenhouses are made out of glass and it's an insulator) and the Earth is getting hotter by the second (although we're having the coolest spring in decades) car pollution and cows farting are destroying the water supply that normally gets regenerated every 6 months. So you have to stop drinking water that wasn't brewed a million years ago, besides, if you drink "older" water you're cooler than everyone else...like if you drive a hybrid!