To: Bearcatbob who wrote (26729 ) 1/10/2004 5:11:13 AM From: E. Charters Read Replies (1) | Respond to of 39344 Hydrogen is no more dangerous than natural gas. It is far less explosive than propane or natural gas. It is 100% less sensitive to explosion or fire from tank penetration than LPG or other gas. It is however more volatile, and tends to leak insidiously through fittings that would be propane leak proof. It would need a higher standard of leak detection and proofing than any other bottled gas. However the spectre that it is somehow dangerously explosive is simply not true. In fact the Hindenburg disaster was more caused or initiated by the highly flammable surface "paint" rather than hydrogen itself. In fact it was a demonstration of the surviability of hydrogen fires, as the flames were not nearly as destructive as methane would have been. People survived they Hindenburg crash. They would probably not have if it were an air crash with liquid fuel which caught fire. If it were put into a carrier and heat evolved, as in iron chips, it is almost totally safe. That has been demonstrated in Germany with experimental programs in buses. It may be possible to recombine/dissolve the hydrogen with other organic or gas carriers to make it less volatile. In the end hydrogen is the least polluting and most efficient fuel cell feed. This makes it an attractive mobile energy store, even if it is difficult to store. People have pointed out that Hydrogen is not a fuel, but an energy transfer carried so to speak. It take energy to make it. This is in the end avoid an large issue, as it takes energy to make all fuels, but in the case of mined fuels, we ignore that, which is at our eventual peril. We must look finally at how we create the energy in the first place. We do not conserve much if we burn coal to make hydrogen, except that we have lots more coal than oil, we think. What this all points out is that (safer) nukes may be an unavoidable choice for the next 100 years if we are to use energy at the rate we are growing into now. EC<:-}