Emissions-free flight could be a possibility in the future, as Boeing is working to develop a light plane that is powered by fuel cells and order viagra 25mg online canada an electric motor instead of levitra for daily use fossil fuels in 12 month's time. The only emissions from such a plane would be water vapor.
At this point, the plane would be a small craft, and might have a top speed of only 70 miles per hour. It's not going to be a replacement for commercial passenger craft any time soon. But it's certainly another avenue for research and development toward what might some day be cleaner, greener air travel.
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