Podobni Video posnetki:
 | crossing east over San Francisco Bay, California | San Francisco–Oakland BAY BRIDGE
The San Francisco–Oakland Bay Bridge, known locally as the Bay Bridge, is a comp... |
 | Bodega Bay, California ride from Highway 101 west through Marin County, CA - THE BIRDS
Ride from US Highway 101 north in Marin County, CA to Bodega Bay, site of Alfred... |
 | Norwegian Sun cruise ship tour of Glacier Bay National Park & Preserve
Glacier Bay National Park and Preserve in Alaska.Text of video:Hey guys, want to... |
 | 175' Ferris Wheel | SEATTLE Great Wheel
The Seattle Great Wheel was built in 2012. Standing 175 feet (53 meters) tall, ... |
 | Wyoming, Idaho, and Montana | Yellowstone National Park tour
Yellowstone National Park in Idaho, Wyoming and Montana. Old Faithful, elk, bis... |
|
Opis:
Je nachdem welche Art von unterirdischen Hohlräumen man betritt, kann man dort auf verschiedenste giftige Gaskonzentrationen stoßen. Eine hohe Kohlenstoffdioxid-Konzentration ist dabei wohl die häufigste Gefahr für Höhlen- und Altbergbau-Interessierte. Wie kann man sich schützen?
|