http://gallery.usgs.gov/images/logos/usgs_only.jpg USGS Multimedia Gallery for tag: CO2 http://gallery.usgs.gov/ en-us OC_Web@usgs.gov (Office of Communications Web Group) http://gallery.usgs.gov/images/USGS.gif USGS http://gallery.usgs.gov/ <![CDATA[View of tree kill area at Horseshoe Lake in the Long Valley Caldera along the east side of the Sierra Nevada in east-central California.]]> http://gallery.usgs.gov/photos/06_30_2009_lPGs3WUi21_06_30_2009_0 <![CDATA[Sign above bathroom at Horseshoe Lake announcing CO2 hazard. Notice the ventilation in the bathroom.]]> http://gallery.usgs.gov/photos/06_30_2009_b27Iam4YXt_06_30_2009_1 <![CDATA[CO2 Hazard sign at Horseshoe Lake.]]> http://gallery.usgs.gov/photos/06_30_2009_b27Iam4YXt_06_30_2009_2 <![CDATA[Viewing domes and craters from the Mammoth Mountain gondola.]]> http://gallery.usgs.gov/photos/06_30_2009_vbr1Uhg76O_06_30_2009_5