What are the main natural resources mentioned in the text and what is their importance?

The main natural resources mentioned in the text are land, forests, rivers, lakes, and seas.
Land is used for agriculture and provides agricultural, livestock, and mineral products.
Forests provide raw materials such as wood, oils, and resins, and also have a controlling influence on the climate.
Rivers, lakes, and seas are important for agriculture, electrification, fishing, and transportation.
Natural resources are scarce and their conservation is important for the efficient use of resources to meet the needs of society.