sentences: the air around the equator receives direct sunlight
docs: moonlight is sunlight_reflected_off_of_moon. sun is stronger_at_equator. direct_sunlight is sunlight. world has north_and_south_hemispheres outside_atmosphere is no_air. ozone is gas_in_atmosphere. sunlight has effect_of_heating_earth hemisphere'pointing_toward_sun is in_summer. air is atmosphere. earth's_atmosphere has oxygen