all right, a new united nations report on climate change warns, the world has only three years to act in order to avoid an irreversible catastrophe. meanwhile, a california start-up is doing its part to cut down on greenhouse gas emissions by creating a new kind of alternative meat. cbs carter evans reports, as part of our new series, american innovation. today, we re going to be making a little air protein chicken korma. reporter: it s a classic indian dish, with a twist. it looks like regular chicken, the way it cooks. you know, it gets that little crust on the outside, there. that s the beauty of it. reporter: physicist lisa dyson is the founder and c.e.o. of air protein, and cbs news is getting an exclusive look at a product she says has the taste and texture of meat, but not come from animals. it s created using a fermentation process, similar to making yogurt, but instead of using microbes that consume milk and sugar, air protein uses microbes that eat oxygen, nitrogen