If love is in the air, the why is the world so polluted?

i guess because love can be toxic ‍♂️

i guess because there isn't enough love going around. < 3

The presence of a selectively permeable membrane allows the cell to exercise control over the quantum, timing and rate of movement of these molecules. Movement across a selectively permeable membrane can occur actively or passively. For example, water molecules can move passively through small pores on the membrane.