Les is a free university. It will show you how to solve environmental problems, find an inexhaustible source of energy, heal a dangerous wound, and even survive the death of a loved one. Trees are unique. They are born, live for hundreds and thousands of years, and die. They have a memory, and they are able to survive droughts, cold weather, and the destructive activities of humans. There are many similarities between the way the tree and the human body function, and the forest world lives according to the same laws as society. In his book "Nature Strategies", Austrian engineer Erwin Thoma, who has devoted his life to studying the forest and working with trees, talks about how this unique natural ecosystem develops and how understanding the processes that occur in the forest can improve human life. The book is published in Russian for the first time.