Can someone list 2 things for things I want to learn please?

Why should the united state be concerned about air pollution in china?

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?