What activities can increase the amount of atmospheric CO2?

bush burning

Explanation:

Since CO2 is a byproduct of combustion, it is released in a large quantity during bush burning

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!