New Moon: The moon is not visible in the sky. Except during a solar eclipse, Waxing Crescent: The moon is less than one-half illuminated by the sun but less than one quarter illuminated. Occurs when the moon's illumination is increasing, First Quarter: The moon is one-half illuminated by the sun. Occurs when the moon's illumination is increasing, Waxing Gibbous: The moon is more than one-half illuminated by the sun but not completely illuminated. Occurs when the moon's illumination is increasing, Full Moon
Preservationist is generally understood to mean historic preservationist: one who advocates to preserve architecturally or historically significant buildings, structures, objects or sites from demolition or degradation.
A supporter or an advocate of environmental conservation is called a conservationist while the term environmentalist is also used for the purpose. Conservation is the term used in the sense of preservation for the future. Consider the usage of the term conservation of water. It only means that water is conserved for future use.