According to scientific data on climate change, what levels have risen by 30% over the past 200 years?
a.
ozone
b.
argon
c.
carbon dioxide
d.
krypton

9. wind power creates pollution. water air soil noise

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

In each transformation of energy , some energy what?