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There is a myth that electric cars will eliminate Greenhouse gas emission and reduce the global warming. Electric car will not reduce the greenhouse emission because; you still need electricity to charge your batteries. Companies promoting electric cars are now planning to set up their own battery charging stations because, customers have to charge batteries of these electric cars every now and then. Otherwise, they will not be able to drive their electric cars continuously.  There is no battery currently in the market that can last more than 28 hours between the charges, though many companies are trying to develop superior batteries. One company claims a Battery(electricity) of 300whr/kg, for their LLithium-ion polymer battery, much superior than other batteries, which can run 600kms, with 6 minutes charging. Though, new batteries such as semi solid Lithium-ion battery, based on the principle of ‘flow batteries’, are promising, it is still, a long way to commercialization. President Obama  has set a set a target of 1 million electric cars in US roads, by 2012.It is estimated that US has to produce about 40 billion dollars worth of domestically produced batteries. A lithium-ion battery which weighs less and stores more energy is the promising technology. But Lithium resources are limited. Battery is the heart of an electric car. These electric cars do not emit smoke, or make noise like petrol cars. But, these two factors alone are not sufficient to substitute traditional fossil fuel powered international combustion engines.

It is also true, that electric cars can cut green house emission to an extent, where fossil fuel consumed cars are replaced with electric cars. To that extend, the fossil fuel consumption by these cars are reduced. But the power to charge the batteries will still have to come from the common grid. Unless the power generation technology using fossil fuels is changed, there will be no dramatic greenhouse gas emission reduction by introducing electric cars. Alternatively, if cars are built on Hydrogen based fuel either using a conventional Internal combustion engine, or by using Fuel cell, then a substantial amount of greenhouse emission can be eliminated. However Hydrogen generation should be based on Renewable energy source only. Whichever way one looks at it, renewable energy is the key. Those Governments and companies who do not invest in renewable energy technologies and systems, now, will have to pay a heavy price, in the future. But even those companies investing on renewable energy technologies, should look beyond current technologies and systems. The best starting point for these industries will be to substitute ‘storage batteries’ with ‘stored Hydrogen’.

It is much simpler to install PV solar panels or wind turbines, and to generate Hydrogen on site, from water. One can store Hydrogen in fuelling stations, and fuel the cars. Honda was the first entrant into this market, who was focusing on fuel cell technology, using compressed hydrogen gas. Alternatively such Hydrogen can be generated from ‘Biogas’ generated from biological wastes and waste treatment plants. All necessary technologies are currently available to make it happen. Governments can try to promote small townships with Hydrogen fuel stations, and show case such models to the rest of the country or other nations to follow. This will help nations to reduce their greenhouse emission and at the same time, they can become self-sufficient in their energy requirements. They no longer have to depend on polluting oil and gas, from few Middle East countries. Countries like India with impressive economic growth heavily depend on oil imports and any slight fluctuation in oil prices can easily upset such growth. It is time Governments around the world take a serious look at Hydrogen, as their alternative energy source. It is just not good enough to promote renewable energy technologies, but they have to develop generation, storage and distribution technologies for Hydrogen. What is needed at this hour is, ‘will, determination and leadership’ on the part of the Governments, like US, China and India, that can set an example for the rest of the world by investing in Hydrogen economy.

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