The reason humans can't impact the CLIMATE with CO2 is because our release of CO2 is miniscule in comparison to the CO2 absorbed and released by for example the oceans due to changes in the sea temperature due to the Sun.
Complete Bullshit. That is the natural carbon circulation. Taking carbon out of the ground and transport it into the atmosphere and the ocean means to enrich the atmosphere and the ocean with additional carbon. Every child understands it.