The most available renewable energy source is the person himself!But not in the rain! And not in the winter! The most common on the planet transport this bike! But not in the rain! And not in the winter! We can solve two problems at once!
All technologies have already been created. And you can get very quickly own a comfortable, four-wheel, all-weather, all-season bike. Then the most affordable source of energy will always be with you! You can use every day, this source to solve their