How does corona machine work???

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Recommend a strategy for incorporating sustainable human activity into a tropical rain forest biome.

Several billion years ago which gas was the least prevailant in the atmosphere