PersonDude wrote...
mnx wrote...
PersonDude wrote...
Regarding hydrogen:
It does have a good potential to be used as an energy source. It does have risks, but we wouldn't be living in the same society as now if we did not take risks. Gasoline used for stoves, cars and many other things was considered potentially dangerous but used anyway and we are doing fine right now.
regarding hydrogen,i think what's currently halting us from using hydrogen in a big scale is not the risks(we use nukes,although it's risky,remember?),but the source of energy needed to divide the H atom from H2O...
After the Chernobyl accident you hardly see any nuke plants built because of the risks. Same with hydrogen power. Many scientists have been saying it's too risky. Though you are also right on the fact that you are barely conserving energy since you use some to split the molecule.
You are right on several aspects. In the United States, no new nuclear power plants have been built in many years. The irony of this is that these new plants would likely be safer and more efficient than the old ones. And even though there is a potential for danger, including a catastrophic accident, such as a meltdown, the odds of it are unlikely. For example, France has built many nuclear reactors in recent years and they have not had any major problems with them.
However, you are not quite right on your last point. Although energy is required to split the molecules, a much greater amount of energy is produced. The energy(heat) is then used to boil water to spin turbines etc.
As for hydrogen fuel sources, hydrogen is not inherently dangerous unless put under pressure in a pure hydrogen tank (which some car manufactures are experimenting with.) Hydrogen can also be seperated from water through electrolysis and used almost immediately, minimizing the explosive risk, however, the downside to this is that electrolysis requires electricity. This could be circumnavigated through the use of solar cells, but they can be expensive to manufacture and will not work in the absence of sunlight.
Perhaps for now, the best alternative is nuclear energy, with increased safety measures and ways of dealing with the radioactive waste.