What to know about vinho verde, Portugal's effervescent bargain wine

To beat summer heat, wine lovers often turn to vinho verde, a light, refreshing wine from northern Portugal that has enjoyed a boomlet the past few years. One sign of its popularity – several local wineries are producing their own “verde-style” wines with the hallmarks of sharp acidity and slight carbonation. (Ankida Ridge and King Family Vineyards in Virginia are two examples.)