This month, Road to Rio heads to Mexico
Watch the show at the following times:
Wednesday, June 20: 0930, 1630,
Saturday, June 23: 0430, 1830,
Sunday, June 24: 1130
(all times GMT)
The journey finishes at Rio+20 conference, where CNN's Philippe Cousteau hosts a discussion to examine the environmental problems leaders are trying to solve for the future.
The show's finale will air from 29 June