Because of this every living organism died leading to what the world is today (a bunch of ghosts in the clouds)
800 years ago there was a terrible eruption in Iceland and all the ash clouds/smoke covered the sun for 6 months in the mid-western part of the US.
Iceland Eruption By: Trista Mitchell
Let me take you back to that time and explain how this happened.
Photosynthesis is the process that plants use to make food for themselves. They have certain things they need such as light, water, and carbon dioxide in order to produce what they need to live.
As you can see this plant is slowly dying and same with other organisms in which we will see later. But, the reason this plant is dying is because of the enviorment and the fact that it cannot do photosynthesis.
Adding on to the box before if plants to not have those reactants then they can not produce oxygen and glucose for themselves and other living organisms.
Once the process has begun everything is put into a cell by xylem and pholem called chloroplast where everything is made into glucose and oxygen by a chemical in the chloroplast called chlorophyll. Once that is done the whole process is finished but remember because the sun is blocked the plant can't start the process in this senario
A Little Information
The photosynthesis process starts in the leaves and roots where little pores called stomata absorb the carbon dioxide and the chlorophyll absorbs the light energy. The roots also absorb the water finally beginning the process.
Cellular respiration is similar to photosynthesis and different. For example its equation is the exact opposite from photosynthesis.
And just a bit farther away their is animal with a same story but a bit different, and these animal are dying cause of the energy cycle/cellular respiration.
if we have no plants then every organism will die because we do not have a energy cycle and we need that to do cellular respiration. Cellular respiration is mainly in mitochondria the organism in our body that controls energy.
The reactants for cellular respiration are oxygen and glucose and then we make the reactants that plants use. But the problem is...
The enegy cycle is a cycle that involves photosynthesis and cellular respiration. The reason we need both is because human and plants depend on each other for their reactants and if we do not have the reactants we will die which is what happened in this case.
And that is what happened many, many years ago! Just remember photosynthesis is very important and so is cellular respiration!