We can't use fossil fuels forever, someday we will run out of coal for example.
Many weight charts have 10 pound increments in each frame size; small, medium, and large. ... Being big-boned or small boned doesn't justify a 20-25 pounds differential from a normal size person. If you are truly convinced you are not overweight just big boned.
They all have the same number of electrons in their outer shell.
Answer:
it prevents leakage of water
The term they use is group.