As popularized by Esme Gigi Genevive Squalor, of Lemony Snicket's "A Series of Unfortunate Events" book the 6th.
Recipe inspired by Kathryn Kingsbury's, at http://www.herbcompanion.com/recipes/08_09_05-parsley
You may also want to check out mediaphage's Ginger Ale recipe:http://www.instructables.com/id/Homemade-ginger-ale
2-Liter Soda Bottle & Cap (clean it well with soap, or a diluted bleach solution)
1 to 2 cups Sugar
Juice of 2 Limes
Yeast (common baker's yeast will work, but wine or champagne yeast is recommended)
1 bunch of fresh parsley