Endangered Species

In physics, a magnetic field is that part of the electromagnetic field that exerts a force on a moving charge. A magnetic field can be caused either by another moving charge (i.e., by an electric current) or by a changing electric field. The magnetic field is a vector quantity, and has SI units of tesla, 1 T= 1 kg·s−1·C−1.
There are two quantities that physicists may refer to as the magnetic field, notated H and B. In a vacuum, they are equal. Although the term "magnetic field" was historically reserved for H, with B being termed the "magnetic induction," B is now understood to be the more fundamental entity, and most modern writers refer to B as the magnetic field, except when context fails to make it clear whether the quantity being discussed is H or B

The cause of nuclear power has effected the animals ,for example whales and dolphines also many species of fish are getting stranded in the beach.To prevent this from happening we should tend to use wing,solar,hydroelectric energy more often.