Oceans are a critical ressource

The weight of oceans on both climate, ecosystem equilibrium and economy is more than overriding. Moreover, they are an important carbon resource because of its microscopic plant life (phytoplankton). Oceans absorb 30% of the carbon dioxide componing our atmosphere while producing 50% of oxygen on Earth.
In addition to their crucial involvement in decreasing and capturing CO2, microalgae are the basis of the underwater food chain. Such a small cell with so much influence !

Coccolithus pelagicus

This microalgae measuring from 5 to 50 microns has a typical calcium-carbonate outer shell (which is named “coccolithus”) and is to be found on Earth for hundreds of millions of years. The photosynthesis induces the development of small shields which form the microalgae outer shell.
This microalgae contributes notably in both CO2 capture and oxygen production processes. During its whole lifecycle the coccolithus pelagicus is renewing its small shields. Older ones fall on the bottom of the oceans making sediment from which the chalk comes. Cliffs of Etretat are a good example of this phenomenon.

Lungs of our Earth

You may have already eard that oceans and forests are the lungs of planet Earth : this is because of their participation in both capturing the CO2 and producing the oxygen we breath. They are essential to our suvival.
However, and without trying to question the need of forests at any moment, we have to notice that :
  • The tree photosynthesis relies on the surface of the leafs. as a consequence, this process can be heavily slowed down during winter in some parts of the world.
  • The tree photosynthesis process is reversed at night : trees are then emitting CO2.
  • Young trees are not efficients before many years.
  • At the end of its lifecycle, a tree is emitting the accumulated CO2 while burning unless it is transformed for another use.