Global warming 1
Sir,
Kim L. Critchley’s letter to News Weekly (September 29, 2012) expressed concern that Arctic ice was shrinking in response to human-induced global warming.
History shows that the growth and loss of Arctic ice is not unprecedented. The Norwegian polar explorer Roald Amundsen sailed through the Northwest Passage in 1906, as did others in the 1940s. The submarine, the USS Skate, surfaced at the North Pole in August 1959.
Variation in Arctic ice extent …
