Cows emit a massive amount of methane through belching, with a lesser amount through flatulence. Statistics vary regarding how much methane the average dairy cow expels. Some experts say 100 liters to 200 liters a day (or about 26 gallons to about 53 gallons), while others say it's up to 500 liters (about 132 gallons) a day.
1 According to author Stu Silverman the average cost of adding a garage begins at roughly $7,500, and for a two-car garage the average costs will go much higher.2  This sort of structure will average at $27,040. 3  The resale value of this update would hold at $21,635, or a nearly 81% return on investment.or the garage addition, the typical costs include: 1  According to author Stu Silverman the average cost of adding a garage begins at roughly $7,500, and for a two-car garage the average costs will go much higher. 2  The above figures place the garage addition at $40 per square foo t.
How much does it cost to build a garage? Cost to build a new 2 car garage will vary from $30 to $41 per square foot for standard construction including labor cost and materials prices.31. Typically the bigger garage you build the cheaper it cost per square foot for identically designed structures and same materials used. How much did you spend for building a garage? ----------------------------. * The numbers are a general idea what expect to pay for a particular remodeling project.