How do we know the drastic increase in the atmospheric CO2 level in the past 170 years is due to human activity and not natural causes? claim

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4