Why, in the preservation of the geographical environment, coordinated actions of the population of all countries of the world are necessary?

There are two reasons for this:
1. The peculiarity of the environment is such that, unlike states, it has no borders, therefore, the negative impacts that occur in one country worsen the ecology throughout the globe.
2. Any regional / local environmental problem gradually develops into an international one, if not resolved in time.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.