Hydrogen is colorless, odorless, neotravitor.
Burning hydrogen in internal combustion engines or gas turbines produce negligible emissions noxe.Daca cell batteries used in low temperature eg emissions can be reduced to zero. In the process of generating energy from hydrogen and air or oxygen only product of the reaction is water distilata.In cell batteries high temperature emissions are a hundred times smaller than the thermal conventionale.
Mankind is growingNever before have lived as many people on our planet as today. There are more then six billion people now, and their number will increase further. On which scale it will increase, no one can say with certainty. If you take a look at the UN scenario of the least growth, you will see that there will be up to 9 billion people in 2050. This scenario would demand very drastic measures and therefore the actual population will be supposedly higher in reality. Extrapolating this trend there will be 13 billion people in one hundred years. All those people have a right to meet their basic needs for food, housing, heating, education. Therefore we need huge amounts of energy! Now more than 2 billion people have no access to electric power. Therefore they do not participate in energy consumption yet.
Can the way of living in the industrialized countries serve as a model for the world? Considering who is using the energy today one finds a striking imbalance. Only 17% of mankind live in industrial nations but nevertheless they have a share of more than 60% on the total energy consumption!How are our energy requirements met today?More then 90% of today's energy supply consists of coal, petroleum and gas. So we meet 90% of our energy requirement by burning fossil fuels. At today's consumption rate petroleum, our most important fuel, lasts for another 40 to 50 years. One can easily work out what would happen if the other 83% of mankind consumed as much energy as we do: In less than 10 years the world's remaining petroleum would be used up! Therefore resolving the world energy problem has to start with us. We have to reduce our energy consumption and we have to introduce modern technologies. In actual fact the developing countries do not yet participate in global energy consumption!
Today's energy is fossilFossil fuels are coal, petroleum and natural gas. They are not renewable, once burnt they are gone forever. These sources supply more then 90% of our energy requirement. In this context two problems are paramount. One problem is the question for how many years these fuels will be available. The other problem is the pollution caused by burning fossil fuels. That's why we subdiveded the fossil chapter into two subchapters:
Energy Conservation is a Means of Climate Protection The graph on the right shows the development of the average temperatures in the last 140 years. The trend shows a clear increase of temperatures. The graph also shows the increasing concentration of carbon dioxide in the atmosphere. This is mainly due to the burning of the fossil fuels coal, oil and gas. During the last 50 years the mean temperature on earth increased by about 1degree. At first this does not sound too dramatic. But this increase has caused a dramatic reduction of the size of alpine glaciers and the beginning melting of huge areas of ice in the polar region. Most important an increase of the average temperature by 1degree leads to an increase in the occurrence of weather extremes like periods of draught, storms, floods etc. Biological adaptation processes can not happen at that fast rate of change, the variety of species begins to decrease. Particularly within insurance companies there is a growing awareness that natural disasters are a consequence of climate change. The causal correlation between climate change and the emission of carbon dioxide can at the moment not be proven with final certainty-but also the proof of the contrary is not possible. Yet all measurements confirm this theory. Our grandchildren and great-grandchildren will have to take the consequences of our experiments with atmosphere - this should be reason enough for us to act. If the prognosticated increase in energy demand is to be met by fossil fuels then the world-wide emissions of greenhouse gases will have doubled by 2030!
The grafic shows the temperature divergences from the mean value. Warmer years are green, colder years are blue. The last decade had been the warmest in the last century. The orange line represents the increasing carbon dioxide concentration in the atmosphere. Satelites view of a hurricane A 2000 square kilometers iceberg breaks off the "Larsen Shelf ice" near the south pole.
World Energy Resources