5 Research (p. 219)
Here are a few links that may come in handy.
See activity 5 on page 219 in your textbook.
The Cooler Heads Coalition; About Global Warming
The Global Warming Sceptic
Responding to Global Warming Skeptics; Prominent Skeptics Organizations
Bush attacks environment 'scare stories' (The Observer 2004)
Global warming: An inconvenient truth or hot air? (The Independent)