Cow farts contain methane, can a cow really fart enough for a car to drive all day? Where can methane be collected?

Yes, cow farts do contain methane. However, the claim that a cow's fart could power a car for a day is exaggerated and inaccurate.

The amount of methane produced by cow farts is relatively small and would not meet the all-day energy needs of a car.

To collect methane, there are a few places that are particularly well suited. The most common of these are landfills and digesters. In landfills, methane from the decomposition of organic waste is collected, processed and utilized. Biogas digesters are facilities where methane is produced from the fermentation of organic wastes (e.g., agricultural residues, manure, etc.), and methane can be collected from the digesters and used for energy production.

To summarize, cow farts contain methane, but they cannot be relied upon alone to supply a car's energy needs for an entire day. Effective ways to collect methane include landfills and digesters.