In the US, a vegan substitute for ground beef is already being sold, with a vegan source of heme used to make it taste like beef, and protein from vegetable sources.
It's around twice the cost of the meat it replaces, though, so I'm not going to try it soon.
No word on how much carbon dioxide is produced by this production, and therefore whether it makes climate change better or worse.
The same company is working on developing vegan substitutes for other meats.
Not much work seems to be ready on duplicating the texture of meats that aren't ground.
Also, I've seen some articles on making cattle produce less methane by adding a certain type of seaweed to their diets.
It seems worthwhile to check if one of the two major methods of feeding cattle in the US produces less methane than the other. One is feeding them mostly grass, and the other is feeding them mostly grain. I haven't found any announcements of anyone even doing such research, or any results.
Here is the US, a major source of methane of leaks is from natural gas lines, and also the initial waste from the fracking method of producing more natural gas. Many oil refineries vent off their lighter hydrocarbons, including methane. If they burn these hydrocarbons as the vent them, it produces carbon dioxide; if they don't burn them, they include methane.
Cattle, rabbits, and termites are among the few animals that use cellulose (found in grass and in wood) as a significant part of their diets. All do it by maintaining colonies of bacteria that produce enzymes that can split the bonds in cellulose; no animals produce these enzymes without using bacteria. Research seems worthwhile on which animals of this type produce more or less methane.
