(PBPulse) - On this Earth Day, the Swirl Girls tip our made-from-recycled-material hats – and our wine glasses – to South Africa and its extraordinary winemaking standards. What began as an idea for a national "teach-in" on the environment, Earth Day, inaugurated on April 22, 1970, resulted in a demonstration by millions of Americans for a healthy, sustainable environment. And nowhere in the vineyards, as a whole, is that effort toward environmental stewardship more dedicated and robust than in South Africa.