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Study concludes forests are decreasing, but how good is the data?

Using data from 541 randomly selected 18.5 by 18.5 km blocks, an analysis of Landsat-7 satellite data has concluded that 3% of the forests (1 million square kilometer) present in 2000 were gone by 2005. See map at http://www.sciencenews.org/view/download/id/58673/name/WHEN_A_TREE_FALLS . The researchers...

Planes can trigger small localized snowstorms

There has been a debate over the years re whether aircraft flying through clouds can trigger changes in the local weather. Researchers have now identified the circumstances when such may happen. Water typically freezes at 32ºF or 0ºC. But, in the absence of dust or other small particulates...

California sets forth indicators of disproportionate impacts of climate change on environmental justice communities

To assist Cal-EPA with the examination of potential environmental justice concerns associated with climate change, Cal-EPA requested the Office of Environmental Health Hazard Assessment (OEHHA) [best known for its role in setting drinking water related Public Health Goals and in overseeing much of the...

Ninth Circuit rules that owners of storm water systems (e.g., cities, counties, districts) are liable for discharges of polluted stormwater into rivers and ocean

It is well known that stormwater gathers a variety of pollutants as it flows across the landscape and even through stormwater drainage systems. See, for example, http://cfpub.epa.gov/npdes/home.cfm?program_id=6 and http://www.epa.gov/owow_keep/NPS/index.html . In NRDC v. County of Los Angeles, Ninth...

Rivers are discovered in the atmosphere, and they can convey a lot of water

As I look out the window and once again view the downpours that have impacted California for months, it seems appropriate to describe one of the more interesting discoveries of the last decade, rivers in the atmosphere. Think of it as the "Pineapple Express", only in spades. Completely unknown...