Battle on to save Brazil's tropical wetlands from flames

A vast swath of a vital wetlands is burning in Brazil, sweeping across several national parks and obscuring the sun behind dense smoke.Preliminary figures from the Federal University of Rio de Janeiro, based on satellite images, indicate that nearly 5,800 square miles (1.5 million hectares) have burned in the Pantanal region since the start of August — an expanse comparable to the area consumed by the historic blazes now afflicting California.Brazil's National Institute for Space Research,