The wine industry is changing. Supply is exceeding demand and local grape growers are seeing that impact as the California wine country is leveling hundreds of acres of vineyards."We are in a structural oversupply of how many wine grape vineyards are in the ground versus the demand of wine consumption worldwide," said Aaron Lange, vice president of operations at LangeTwins, Inc. The piles of vines through the valley are a reflection of the challenges that grape growers are facing.Excavators are ripping through hundreds of acres of vineyards in the San Joaquín Valley, as wine grape growers figure out how to turn a once lucrative business into another one.LangeTwins has removed 150 acres of vineyards at their family ground. The land will be used for grazing, impacting the local job economy.California's wine industry is responsible for 422,000 jobs in the state.But a decline in demand is only one factor.The oversupply is being felt around the globe, and big wineries are importing finished wine from overseas because it's cheaper. Costs to farm wine grapes for local growers have doubled in the last two years. Pests and diseases also contribute to the challenges of the wine industry.At JM Moore Vineyards, owners have ripped out 50 acres of crop as diseases invaded part of their 186 acres of vineyards.The removals are sparking another conversation among grape growers who have to follow new regulations imposed by the San Joaquin Valley Air Pollution Control District to reduce air pollution.One option is for growers to separate the metal stake from the vine. A process that is lengthy and expensive."We have to follow a completely different process to rip out our vineyard, than, say, someone in Sacramento county can do – which is maybe a mile from here. They could still pile out their vineyards in large piles and burn them," Lange said.Don Ludy Farming, Inc. in Kern County tells KCRA 3 that over the last two years, the number of requests for the removal of vineyards has increased.