Most of us have had some experience with lightning. The chances are that our experiences have been terrifying and destructive, and we may view lightning as a bad thing. You may wonder if we need lightning. The short answer is, “Yes.” Lightning is a good thing, and there are many things we are still learning about it.
Lightning helps produce the nitrates and other nitrogen compounds that are needed by all living things on Earth. The process is called “nitrogen fixation, ” and it is vital to our very existence. Water droplets in the air carry an electric charge. That charge can accumulate to dangerous levels unless there is a way to neutralize it. That’s where lightning comes in.
One of my favorite demonstrations as a physics teacher was to get a very small flow of water going from a faucet and then bring a charged rod up to the column of water. The stream of water will bend in response to the charge. That is because the polar nature of the water molecule allows it to have electrical properties. Because of water’s electrical property, lightning is generated to release nitrogen from the air and deposit it in the crust of the Earth as nitrates and other nitrogen compounds that plants need to grow. The plants then feed and protect the animals and us.
Low Earth orbit satellites and high flying airplanes have recently made us aware of other properties of lightning. We have learned that red sprites occur and they have been photographed above large thunderstorms. Other upper atmosphere lightning phenomena include blue jets and terrestrial gamma flashes. Scientists are studying the highly complex nature of lightning to understand how the system works.
The Bible makes many comments about lightning. It tells us that lightning is made with water (rain) even though people at that time totally ascribed lightning to supernatural causes. (See Jeremiah 10:13 and 51:16). Lightning is referred to as a tool of God. (See Job 28:26; 36:30; 37:3, 11, 15; 38:24, 25, 35.)
We are just beginning to understand the design of Earth’s atmosphere and why we need lightning. It continues to be obvious that the more we know of the creation, the closer we get to understanding the power and wisdom of the Creator.
–John N. Clayton © 2017