0 the continuous movement of carbon between different living organisms on earth and between living organisms and the environment, through natural processes like photosynthesis, respiration, and decomposition in the soil, and also the burning of fossil fuels --
1 the way that carbon is exchanged between different living organisms on Earth and between living organisms and the environment, for example, when plants take carbon dioxide from the air, and when animals eat plants --
2 the continuous movement of carbon between different living things on Earth and between living things and the environment, through natural physical processes and also through the burning of fossil fuels: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.