metals (left side of periodic table) become positive ions so calcium would be the answer
Biosphere- protect habitats
Atmosphere- reduce auto emissions
Hydrosphere- reduce,reuse,recycle
Geosphere- limit fertilizer
Thus, light energy is initially converted to chemical energy in the form of two compounds: NADPH, a source of energized electrons ( "reducing power"); and ATP, the versatile energy currency o that the light reactions produce no sugar; that happens in the second stage of photosynthesis, the Calvin cycle.
