The combustion of fossil fuels is releasing more co2 into the atmosphere then what would occur naturally
-- the big flash of light and heat coming out of the head
of a match when it gets hot enough;
-- the explosion of a tiny bit of gunpowder that can send
a bullet many miles;
-- the energy captured from a few drops of burning gasoline
that moves a car;
-- the energy in the carbohydrates you eat that is used
to move you around;
endorphins - chemicals ur brain releases
endurance - ability to last a long time training
cardiovascular- using ur heart lungs blood vessels
using oxygen - aerobic
using muscle - muscular
