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Earlier this week, a strange silhouette appeared on one of the early pictures taken by the Mars Curiosity rover’s Hazard-Avoidance Cams. Shortly after that picture was taken, the mysterious shadow was gone, causing a firestorm among conspiracy theorists worldwide. More »
from Gizmodo
As the emissions of carbon dioxide have continued largely unabated over the past decade, a number of people have given thought to geoengineering, or changing the environment in a way that tweaks the planet’s thermostat. Although people have suggested some exotic interventions—reflecting sunlight away from the Earth with orbiting mirrors—more serious consideration is being given to pumping sulfur dioxide into the stratosphere. But a new paper in Nature Climate Change suggests that focus might be keeping us from considering even better options.
Sulfur is a major focus in part because we know it will work, since major volcanic eruptions provide a natural test of it. The sulfur released in eruptions can reach the stratosphere, where it combines with water to produce aerosol particles that reflect sunlight back to space. It’s estimated that the aerosols created in the wake of the eruption of Mount Pinatubo were large enough to drop the global temperature by half a Kelvin for two years.
Sulfur is also abundant and cheap, making the raw materials for this form of geoengineering relatively inexpensive. In fact, the whole process is expected to be so cheap that some have estimated that it might be within reach of a handful of wealthy individuals. But, even if you were committed to reflecting sunlight back to space, there are some downsides to using sulfur. The sulfur would have to be constantly replenished, and its constant presence at high altitude would trigger chemical reactions that could damage the ozone layer.
from Ars Technica
By all accounts, the Fisker Karma is one hot car. For a couple of owners though, perhaps it’s too hot.
Similar to a situation in May, when a Karma caught fire for no apparent reason in a Texas garage, another has burst into flames in a Woodside, CA parking lot. Rudy Burger was returning to his car after grocery shopping when he caught in the act of self-immolation. According to Jalopnik, he immediately called Fisker, which, in turn, advised him to call 911.
Firefighters arrived quickly and the flames were subdued before much more than just the front driver’s side was consumed. Considering that the A123 Systems‘ battery runs down the center of the car under the passenger compartment, it is possible that the pack was not responsible for the blaze. Wired got a statement from Fisker, which furthers this line of thought. It reads, in part:
Fisker understands damage was limited to the driver’s side front corner of the car, away from the lithium ion battery and electric motors. The car was not being charged at the time.
In an electric vehicle, immediate suspicion is focused on the battery and high voltage components. The location of the damage to the vehicle in this incident appears to rule out that suspicion. Fisker has not had any battery or high voltage fire incidents with any of its vehicles.
Fisker has hired “an independent fire expert to assist the investigation” and says that once the probe is complete and the cause pinpointed, it will issue a statement on the matter. Fisker’s current statement – and a video of the Karma conflagration – is posted below.
from Autoblog
