Because it is an Independent reaction where it is not dependant on solar energy
Scientists often perform experiments to check and recheck their work. They also redo these experiments to ensure correct results.
not gonna lie, this is more of an answer you'd have to answer yourself. It seems like an easy question just think about it. If you're a scientist in a drought, think about places where youd be able to get water. Some plants produce water as well. Soil holds water, Even under normal climatic conditions, about 90 per cent of the precipitation is said to be released back into the atmosphere.
