swezey: oh. hill: so this place will be hummin' starting this weekend. swezey: ok. hill: we were particularly interested in species along the west coast of the u.s. that people would really identify as sort of classic west-coast species. and so we began thinking about ocean acidification impacting abalone and other species that many people on the west coast, if you're walking along a shore, they're the species that you think of as being sort of characteristically what you would find on this shore. when an abalone or a clam is making its shell, it is essentially pulling components out of the water. it's pulling building blocks out of the water and making a hard part. and what ocean acidification does is it makes it harder for them to find those building blocks, so they expend more energy just trying to make a shell to protect themselves from a predator or a crashing wave or whatever the ocean is bringing. swezey: we're realizing that animals that build shells and hard parts take calcium and carbonate out of the water and build skeletons with it. the calcium carbonate