EARTH - THE CLIMATE WARS 2

Dr Iain Stewart investigates the counter attack that was
launched by the global warming sceptics in the 1990s. At the
start of the 1990s it seemed the world was united. At the Rio
Earth summit the world signed up to a programme of action to
start tackling climate change. Even George Bush was there. But
the consensus didn't last. Iain interviews some of the key
global warming sceptics, and discovers how their positions have
changed over time.