If CO2 traps heat, then we would have cooler days, because not as much
heat would strike the earth .

We would have warmer nights, because heat would not be allowed to
radiate back into outer space.

On a hot day the temprature still reaches
100 degrees and then cools down to 70 degrees at night.

That is a difference of 30 degrees solely from heat radiating, with no
other factors involved.

Temprature variations from radiation should be the only factor in
judging if there is any global warming..........

Tempratures vary too much hour to hour for global warming to be an
factor.

If the world was 3 decreed warmer, than it was a 100 yrs ago . then so
what! there is not one plant or animal, that is threatened by 3
degrees............

Now if we had global freezing, that would be a horse of a different
color!