In Holland hundreds of dairy farmers have applied for a permit and made preparations to invest in a mono-manure digester to produce green gas. This gas would be supplied to households and other users in villages and cities. The farmers are encouraged to do this by the government through a multi-year subsidy. It now appears that the government has made a calculation error and the subsidy is approximately 25 percent less than proposed. This makes the investment no longer profitable for many livestock farmers.