photosynthesis it's a completely efficient market there's no wait. that's we can do we can do right now . cept we're all wrapped little petty divisions political infighting. telling us did. it join and. where do we go from there ninety five year old. i miss arizona max. is a good time young riders josh brolin all my old friends and i just listen to some of them folks on the pilgrimage i don't know if they'll talk to us though just. because i think i'm a little kooky with. which i am. so on the jury years in tucson my eldest daughter elias who just got married was born here in arizona. well it's good to be back on the pilgrimage and it's going to bring back a lot of fun memories for me so it's been it's almost a bit of those in the it's alright. charger was a co-op. that's our result in a row zero zero zero zero flashy lights on the back when she knew we'd like pulled over. for a. as they close in on their first stop in arizona our heroes can't help but focus on the political topics ahead of them the citrus farm yesterday got me thinking that agricult

seaweeds like kelp, they actually pick up that carbon dioxide because now it's easier for them to do photosynthesisimagine trees on land, pulling co2 out of the atmosphere. well, seaweeds and kelp are really good at pulling co2 out of the water. >> stahl: so basically what you're doing is the equivalent of planting trees in the ocean? >> peabody: exactly. >> stahl: and then testing to see how much of a difference it makes. >> peabody: we've got scientific mooring buoys anchored at both sides. >> stahl: the yellow. >> peabody: the yellow buoys. >> stahl: they're measuring how water changes as it flows through the kelp field, and seeing if baby shellfish grown with the kelp do better at building their shells. results won't be in for more than a year, and bren smith is eager to see them. he's been growing shellfish on his kelp farm, too, but not, he admits, because of the science. he says it's good business. in november, he and his team loaded thousands of baby mussels into netting that looked like massive sausages, then suspended them from ropes that hang down below the kelp. he calls it 3d ocean far

eel grass is like other plantsat use photosynthesis-- it gets energy by absorbing e.sunlight and carbon diox and that could lessen the effects of ocean acidification. >> they're the same s of oysters. on this shell what we have are paci c oyster larvae or juveniles. so all these dark areas aredi invidual oysters. these have been grown in the eel grs bed. and then on this shell, we have again small oysters, fewer of them, and much smaller that have been grown not in the eel grass bed. >> reporter: fellow oregon state university resrcher caitlin magel, has been starping at estus in oregon and washington, taking random samples from the flats. she's trying to get a handle on just how much carbon these shallow eel grass beds pulling out of the water by sampling the plants' shoots and roots. >> they have this below-ground carbon storage that can lead to long-term sequestration of carbon. >> reporter: eel grass could benefit shellfish growers in different ways. >> it could be grown in and amongst, for instance, an oystea lture bed. or in the case of a shellfish hatchery, they could pinpoint wh