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The concentration of carbon dioxide over an industrial site might be higher, because of the emissions, however, carbon dioxide mixes well with other gases, so it will spread out all over the world.
If it is water moving from a higher concentration to a lower concentration, the diffusion is called osmosis.
Diffusion is the movement of particles from a region of higher concentration to a region of lower concentration. Osmosis is the diffusion of water molecules (only) from an area of higher concentration to an area of low concentration.
Diffusion
osmosis is the passive movement of a substance from a place where its concentration is higher, to another where its concentration is lower. This applies to gases, I guess
lower
diffusion
When there is a higher concentration of water on one side and a lower concentration on the other side, the water on the side with the higher concentration will naturally move to the side with the lower concentration in order to balance the two sides.
Molecules move a from regions where they are in higher concentrations to regions where they are in lower concentrations. Random
Hypotonic is the term describes a solution that has a lower solute concentration and higher water concentration than another solution Hypertonic describes a solution with a higher solute concentration compared with another solution.
estimation by comparison of higher concentration and lower concentration
higher concentration to a area of lower concentration