crystal dilworth and martia davison. now marita you're from seattle, you must have a little bit of oyster pride, pretty amazing up there. >> oh my gosh, one of the things i love about seattle is i have access to oysters and i love oysters, but they have been really hard hit by climate change and you guys know, on techknow we followed the sad story of ocean acidification and the impact it has on the oyster farming business which is a big deal in washington state and elsewhere. >> the problem is really simple chemistry, acid from carbon dioxide in the water is just making it really hard for young oysters to form their shells. >> there could be some hope for them, there are ways for reducing the acidity of the water. we hooked up with some marine biologists in northern california, oysters are awesome and science is making some progress, let's take a look. >> this is tomales bay, california. a little slice of heaven about ninety minutes north of san francisco. this is where you come for the freshest oysters... >> order for m