Landfills have a tendency to emit a host of toxic gases into the air, and by toxic gases we actually mean cytotoxic or carcinogenic gases, like benzene and vinyl chloride. They also leak into the surrounding soils and water sources.
Furthermore, landfills produce methane -- rather, microbes produce it as they devour anything they can and emit methane as a waste product. Being lighter than air, methane works its way out of the air and into the soils or the atmosphere. Methane has a very high global warming potential (GWP), about 12 times as high as carbon dioxide.
Furthermore, landfills produce methane -- rather, microbes produce it as they devour anything they can and emit methane as a waste product. Being lighter than air, methane works its way out of the air and into the soils or the atmosphere. Methane has a very high global warming potential (GWP), about 12 times as high as carbon dioxide.
23°50'S, 132°19'E; rim diameter: 24 kilometers; age: 142.5 +- 0.5 million years 142 million years ago, an asteroid or comet slammed into what is now the Missionary Plains in Australia's Northern Territory, forming a crater 24 kilometers in diameter and 5 kilometers deep. Today, like a bull's eye, the circular ring of hills that defines Gosses Bluff stands as a stark reminder of the event. The crater is located just south of MacDonnel Ranges (top of the picture). It is highly eroded. The circular ring of hills (5 kilometers or 3 miles diameter) is actually the results from differential erosion of the central uplift within this large complex crater. The crater rim is eroded to the point that it is no longer visible though it is probably located along the grayish colored drainage system outside the inner ring. (Courtesy USGS)
