THE enrichment of previously poor countries is the most inspiring development of our time. It is also worrying. The environment is already under strain. What will happen when the global population rises from 7 billion today to 9.3 billion in 2050, as demographers expect, and a growing proportion of these people can afford goods that were once reserved for the elite? Can the planet support so much economic activity?

Reports focus on the possibility a record minimum for Arctic sea ice in September, but a major loss during the early summer months is climatologically more important

Blizzards. Tornadoes. Floods. Record heat and drought, followed by wildfires.

The first eight months of 2011 have brought strange and destructive weather to the United States.

From the blizzard that dumped almost two feet of snow on Chicago, to killer tornadoes and heat waves in the south, to record flooding, to wildfires that have burned more than 1,000 homes in Texas in the last few days, Mother Nature has been in a vile and costly mood.