Air is a vital component of the environment and is a natural mixture of gases. It mainly consists of nitrogen (78%), oxy...
Water is unique and foremost natural resource, a vital product needed for the existence of humanity, wildlife and vegeta...
State regulation of activities and actions by permits and licenses is carried out only in the event, when this activity ...
Energy is a property of particles, objects, or unity of objects and is a quantitative measure of motion and interactions...
