This document discusses air pollution control and desulfurization of liquid fuels. It begins by defining air pollution and describing the types of pollutants including particulates and gases. It then discusses various air pollution control methods such as gravitational settling, centrifugal settling, electrostatic precipitation, and baghouse filters. The document also discusses using nanocellulose crystals derived from waste biomass for adsorptive desulfurization of liquid fuels. It proposes applying artificial intelligence to optimize the desulfurization process using nanotechnology. Finally, it describes adsorptive desulfurization using porous adsorbent materials to remove sulfur compounds from fuels via physical and chemical interactions.