Why didn't CO2 emissions decrease from 1970 to 2010 like SO2 and NOx emissions did?

a) Because CO2 emissions are primarily produced by natural processes and are not easily controllable.
b) Because industries focused more on reducing sulfur dioxide (SO2) and nitrogen oxide (NOx) emissions due to their immediate health and environmental impacts.
c) Because the technology for reducing CO2 emissions was not as advanced or widely available during that time period.
d) Because there was less public and political pressure to reduce CO2 emissions compared to SO2 and NOx emissions.