The second of two documentaries about science in Brazil.
Until recently Cubatao, two hours' drive from Sao Paulo, was considered to be the most polluted place on earth. Even now, the stench of oil refineries and chemical plants fills the air and untreated waste fouls the rivers. Pollution is rife in the whole of the heavily industrialised south-east of Brazil. Meanwhile, up north, huge tracts of Amazonian forest disappear each year as land is developed and peasant farmers slash and burn their way through the region.
Geoff Watts reports on how, after emerging from 20 years of military dictatorship, Brazil is at last beginning to respond to some of the gravest environmental problems caused by man.
Producer JUUAN BROWN