Our modern civilization is depended on fossil fuels for supplying power. Cars use gas and electricity needs coal. We are spending the planet's store of coal and petroleum too fast. How many years more will go like this?
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The weather has changed and is changing for the worst. We can already feel it. Just look at the "unnatural" behavior of the weather throughout the world.
Have you heard about Japan and some countries in Europe that use hydrogen propelled vehicles? I believe this may be one important way of transportation in the future.