Which of Earth's spheres are involved in the water cycle? A. Atmosphere, hydrosphere, and biosphere only
B. Atmosphere, lithosphere, and hydrosphere only
C. Atmosphere, lithosphere, hydrosphere, and biosphere
D. Atmosphere and lithosphere only

Which process is a source of outdoor air pollution? check all that apply. burning gasoline at a refinery releasing fumes at a chemical plant emitting particles from a dump truck releasing radon gas from a generator emitting carbon monoxide from a heater