Electric motor use electrical energy to produce mechanical energy

When we are small child, everything is clean. The air is fresh always.

But when we are growing, the fog appear always, we thought it is fog, finally we know a new name haze. Haze is the weather beside rain, sun, it is a new weather. In these days the air is dirty with PM2.5.

An electric motor uses electrical energy to produce mechanical energy,they are very common by the fact that, they use electric energy with low costs; they are clean, simple, easy to be built and versatile.

The industriall electricity  is expensive than the resident electricity, so some plant still use the environment pollution material to produce energy.