To decrease the likelihood of cultural eutrophication from the effluent released from a water treatment facility, sewage plants may include aa. secondary treatment, using bacteria to breakdown algae. b. secondary treatment, using ozone for disinfection. c. secondary treatment, removing nitrogen and phosphorous. d. tertiary treatment, removing nitrogen and phosphorous. e. tertiary treatment, using bacteria to break down algae

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.