1
is the introduction of substances or other physical elements in a medium that cause it to be unsafe or unfit for use.
2
procedure that is done to maintain the properties of a thing.
3
is that which is obtained from solar radiation that reaches the Earth in the form of light, heat or ultraviolet rays.
4
is a process whose objective is to convert waste into new products.
5
refers to the probability that an animal or plant species disappears.
6
Biological system constituted by a community of living beings and the natural environment in which they live.
7
Set of people or things similar to each other for having one or more common characteristics.
8
That animals are alive and plants are beings.
9
Liquid substance without smell, color or flavor found in nature in a more or less pure state forming rivers, lakes and seas.
10
Atmospheric phenomenon consisting of falling water in the form of drops, coming from the clouds.
