Penny Chisholm : The tiny creature that secretly powers the planet

Penny Chisholm at TED2018
The tiny creature that secretly powers the planet  (transcript)
Summary
I'm depressed because l know that there are many things that l don't know and l can’t explain well, thus l don't know what to write first about the story.
The speaker is an oceanographer that means a person who is a scientist who researches ocean life.
Photosynthesis means a biology process of using sunlight to produce carbohydrates. Especially, plants have and our Earth is really helped by the process that they have.
In this story, the tiny creature is Prochlorococcus that is a marine microbe is said to be the most abundant photosynthetic species on the planet.1)
In fact, it's too small to be discovered, 2) it has existed for millions of years, though. 3)
People in the speaker's team thought that its sound was electronic noise.
After one year later, they realized that it wasn't really behaving like noise. 4)
It's 35 years ago. 5)
Its size is about less than one- one hundredth the width of a human hair. 6)
And then according to the research, Prochlorococcus seems to be able to take solar energy and CO2 and turn those into chemical energy in the form of organic carbon. It can also lock sunlight in those carbon bonds. This is what secretly powers the planet of the tiny creature.

It means that you might use solar energy that is said to difficultly store anytime and anywhere in the near future. 7)
However, our Earth’s environment is not good, thus marine microbes are expected to be reduced. 8)
Can we use the energy? Or, will we kill them before that?

Words in this story
pasture /noun/ grass
smitten /verb/ smite /smīt/ strike with a firm blow.
ecosystem / a biological community of interacting organisms and their physical environment.
chlorophyll /noun/ a green pigment
be doomed / likely to have an unfortunate and inescapable outcome; ill-fated.