the methane changes over time, how it might differ for this cow over another cow or eating different foods. is there any way we can find out how much methane magenta's producing right now? yeah, so the equipment that we have in the chamber is not exactly the same as this — this is a laser methane reader. right. that measures the parts per million of methane that might be coming out of magenta's front end at any one time. let's give that a go. i'm going to get out of the way �*cause it is a laser! there's a laser, and we all know how dangerous lasers are. so, magenta, if you don't mind. yeah, don't listen, magenta! 0k. 0h...she's licking it, she knows it's coming. she doesn't chase it like a cat does. 0h, she's... and the reading is 18 ppm. so it's been a while since she's had a lot of food. 0k, she's having a clean day. all right. thank you, eileen. now, one way to cut down on cow burps is to cut down on cows, of course. but in the meantime, did you know that there is a company that is working on a way to catch the methane as it comes out? how are they doing that? cow masks, of course. true story. the masks have fans in them which suck in the methane and oxidise it and the makers