. >> i'm russell beard in london england to meet a local hero who believes in the environmental benefits of sharing. >> i'm joyce ohajah and i'm in copenhagen, the worlds cycling

. >> i'm russell beard in london england to meet a local hero who believes in the environmental benefitssharing. >> i'm joyce ohajah and i'm in copenhagen, the worlds cycling capital, where many people prefer to travel on two wheels, rather than four. >> and i'm oliver steeds, and i've come to the coast of northern ireland to explore the power of tides. and i'm tamara sheward, in australia's dairy hearan