What has happened to carbon dioxide levels in the atmosphere? Select one:

a.
They have been rising at least since 1958

b.
They rose in the 1950s and 1960s, but are now stable

c.
They have been declining since around 1972

d.
None of the options

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

Idon’t know i’m just trying to get points to make me look smawt