Why does Australia have 2.8bn bottles of excess wine?

When China imposed tariffs on Australian wine, it effectively closed the door on Australia’s biggest wine market. Two years on, wine consumption has dropped internationally and an extended La Niña has led to bumper crops in some regions, leaving Australia with an extra 2.8bn bottles worth of wine. Guardian Australia’s rural and regional editor Gabrielle Chan speaks to Jane Lee about how the wine glut is affecting winemakers, grape growers and consumers