Pollution in Tokyo, Japan

In my introduction, I stated that it would be possible to power the light bulb if I could generate a strong current. My hypothesis was accepted. The current generated from the spinning motor was able to generate enough force to spin the propeller attached to the nail and the magnets, and create an electrical flow of electrons.
Several problems arose while I was building my electromagnetic generator. It was difficult to find a light bulb small enough for the generator to power. I also had to make sure that the nail was light enough so that the water would be able to spin it easily. At one point, the number of magnets I used was insufficient to create a strong enough current to power the light bulb. If I were to redesign my turbine, I would wrap more wire around the Plexiglas so that the magnet does not have to spin as fast as it currently has to. 
Although harnessing the energy from ocean currents is a really efficient way to generate electricity, over-using it might have severe consequences for the entire planet. Instead of only focusing on one source of energy, I recommend that we vary our sources. Hydropower may be a better source for electricity in certain regions such as Quebec, where many lakes and rivers are present.
However, countries such as Japan, which are located in proximity to some of the world's fastest ocean currents, should capitalize on this opportunity. Pollution is a great concern in Japan, but they could reduce it by great amounts if they were to capture hydrokinetic energy instead of burning fossil fuels.