Respuesta :
Answer:
25% of the planetary primary productivity
75% of the ice-free land surface.
Explanation:
The researches and various studies have observed and analyzed that the amount of the Earth’s Net Primary Productivity that human activity consumed is almost 25% of the planetary primary productivity
and,
Out of all the land available on the planet Earth, Human land-uses occupies about 75% of the ice-free land surface.
Answer:
The net primary productivity may be defined as the productivity rate lefts after the gross primary productivity reduced from the respiration. The plants acts as the producer in the ecosystem.
The humans directly or indirectly depend on plants and other animals for their productivity. The humans activity nearly consumes around 75% from the ice-free land surface. Around 25% of the planetary primary productivity is used directly by the humans for their activity.
