What can people do about the problem of pollution? In recognition of UN's "International Day of Clean Air for Blue Skies" today, listen to Adam Navis and Liz Waid tell about a film that looks at the problems of dealing with pollution in China.
Have you eaten seaweed before? Do you enjoy eating sushi? Bruce Gulland and Megan Nollet talk about how a British scientist made an important discovery about seaweed and for the world of sushi.
Roger Basick and Katy Blake talk about the history of the automobile and the present and future advancements in technology.
How can people get fresh food in the city? Liz Waid and Bruce Gulland look at the growing market of vertical farming. Can these city gardens be better for people and the environment?