"Fast-Growing Kelp Invades San Francisco Bay"
"A fast-growing kelp from the Far East has spread along the California coast from Los Angeles to San Francisco Bay, worrying marine scientists and outpacing eradication efforts."
Source: AP, 07/13/2009
Roger Archibald profiles two photographers from different backgrounds who've taken remarkably different approaches to document evidence of global climate change: The retreat of the earth's great glaciers.