What gas is present in the air that is used for photosynthesis?
Carbon dioxide.
What is water for drinking and preparing food?
Potable.
Which layer of the Earth is it possible for life to exist?
Biosphere.
How can we preserve the soil?
Planting trees, not creating fires, preserving forests and also not polluting oceans and the nature.
What protects the soil from erosion?
The vegetation
What type of soil is impermeable to water?
Clayey or clayish soil.
What type of soil is permeable to water and very present in northeastern Brazil?
Sandy soil.
what type of degradation destroys the deepest layers of soil?
Desertification.
What soil contains the remains of animals and plants?
Humiferous soil.