The Monarch Challenge is the brainchild of Carlo Mondavi---grandson of the renowned winemaker Robert Mondavi---who mission has been to reduce the harmful impact of vineyards and agriculture on butterfly biodiversity in California's northern Napa Valley and Sonoma areas. Mondavi has created a system of wine making that shows it's possible to farm sustainably and with minimal carbon footprint while adding only 18 cents to the price of each bottle produced, a model that he says could be adopted by other vineyards.
Useful link: https://www.themonarchchallenge.org/the-wine
