Why Do We Need Light?

Answer

Light has a very vital role in our everyday life. It is used to illuminate objects and to guide our way in the dark. Light is also very essential in transportation as it guides drivers, pilots and sailors as they navigate. Without light from the sun, plants would not be able to manufacture food required for their growth and survival.
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Hello - while I don't claim this as my area of expertise, I do know that JSCAPE has expertise in this area. There are a few good blog posts to check out: Top 8 Benefits of a Reverse
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They do something called photosynthesis in order to get nutrients. Photosynthesis' process requires light, so plants need light.
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2 Additional Answers
We need light to see when it is dark outside. If we did not have light we could easily stumble and get hurt, or be attacked by wild animals.
We need light just as much as plants do, but for different reasons. One is our internal body clock. Light regulates our internal clock and tells us when it's time to sleep and when it's time to wake up. It also prevents depression and illness. We need light to give us certain vitamins we need. You can find more information here: http://www.jsonline.com/features/29324864.html
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