Geoengineering is a set of merging technologies for offsetting negative impacts (mitigation) of climate change (increased CO2). Which of the following statements in NOT true? we need technologies to not only slow CO2 emissions, but to remove what is present

industrial revolution and increased whale hunting simultaneously increased CO2

CO2 emissions were historically around 280 ppm and are now above 410 ppm

reducing whale numbers is a natural (gentle) way to mitigate climate change