Title: Back to nature
Content:  Back to nature or return to nature is a philosophy or style of living which emphasises closeness to nature, rather than artifice and civilisation. In this, the rustic customs and pastoralism of country life are preferred to urban fashion and sophistication. A famous example is Henry David Thoreau who spent two years living a simple life in a log cabin at Walden Pond.
Title: Naturphilosophie
Content:  Naturphilosophie (German for "nature-philosophy") is a term used in English-language philosophy to identify a current in the philosophical tradition of German idealism, as applied to the study of nature in the earlier 19th century. German speakers use the clearer term Romantische Naturphilosophie, the philosophy of nature developed at the time of the founding of German Romanticism. It is particularly associated with the philosophical work of Friedrich Wilhelm Joseph von Schelling and Georg Wilhelm Friedrich Hegel —though it has some clear precursors also. More particularly it is identified with some of the initial works of Schelling during the period 1797–9, in reaction to the views of Fichte, and subsequent developments from Schelling's position. Always controversial, some of Schelling's ideas in this direction are still considered of philosophical interest, even if the subsequent development of 
Title: Conservation movement
Content:  interest of the natural world because they continued to focus on the natural world as a source of economic production.  The American movement received its inspiration from 19th century works that exalted the inherent value of nature, quite apart from human usage. Author Henry David Thoreau (1817–1862) made key philosophical contributions that exalted nature. Thoreau was interested in peoples' relationship with nature and studied this by living close to nature in a simple life. He published his experiences in the book Walden, which argued that people should become intimately close with nature. The ideas of Sir Brandis, Sir William P.D. Schlich and Carl A. 
Title: Naturphilosophie
Content:  Naturphilosophie translated into English would mean "philosophy of nature", and its scope began to be taken in a broad way. Johann Gottfried Herder, particularly taken in opposition to Immanuel Kant, was a precursor of Schelling: "Herder's dynamic view of nature was developed by Goethe and Schelling and led to the tradition of Naturphilosophie [...]" Later Friedrich Schlegel theorised about a particular German strand in philosophy of nature, citing Jakob Böhme, Johannes Kepler and Georg Ernst Stahl, with Jan Baptist van Helmont as an edge case. Frederick Beiser instead traces Naturphilosophie as developed by Schelling, Hegel, Schlegel and Novalis to a crux in the theory of matter, and identifies the origins of the line they took with the vis viva theory of matter in the work of Gottfried Leibniz. Subsequently Schelling identified himself with Baruch de Spinoza, to whose thought he saw himself as approaching. The Darstellung meines Systems, and the expanded treatment in the lectures on a System der gesamten Philosophie und der Naturphilosophie insbesondere given in Würzburg in 1804, contain elements of Spinoza's philosophy.
Title: Adolf Just
Content:  be regained by understanding how primordial man used to live. He held the belief that in the beginning, "all creatures, frog and mouse, hedgehog and hare, deer, and elk, fox and badger" all lived in harmony with the Creator. Animals remained in their pristine state of grace, whilst man fell. He believed that by studying the behaviour of animals, people could experience salvation of the soul. Just believed that Jesus came to redeem humanity by teaching how to live in harmony with nature. His best known work Kehrt zur Natur zurück! (Back to Nature!), was translated by Benedict Lust in 1903. Just opposed everything that was not in accordance with nature. He opposed automobiles, modern housing and chemical agriculture. He 
Title: Naturphilosophie
Content:  The German Idealist philosopher Fichte had attempted to show that the whole structure of reality follows necessarily from the fact of self-consciousness. Schelling took Fichte's position as his starting-point, and in his earliest writings posited that nature must have reality for itself. In this light Fichte's doctrines appeared incomplete. On the one hand, they identified the ultimate ground of the universe of reason too closely with finite, individual Spirit. On the other, they threatened the reality of the world of nature by seeing it too much in the manner of subjective idealism. Fichte, in this view, had not managed to unite his system with the aesthetic view of nature to which Immanuel Kant's Critique of Judgment had pointed. Naturphilosophie is therefore one possible theory of the unity of nature. Nature as the sum of what is objective, and intelligence as the complex of all the activities making up self-consciousness, appear as equally real. The philosophy of nature and transcendental idealism would be the two complementary portions making up philosophy as a whole.
Title: Environmental movement
Content:  rural traditions, without the "taint of manufacture or the canker of artificiality", were enthusiastically revived, including the Morris dance and the maypole. The movement in the United States began in the late 19th century, out of concerns for protecting the natural resources of the West, with individuals such as John Muir and Henry David Thoreau making key philosophical contributions. Thoreau was interested in peoples' relationship with nature and studied this by living close to nature in a simple life. He published his experiences in the book Walden, which argues that people should become intimately close with nature. Muir came to believe in nature's inherent right, especially after 
Title: Thinking like a mountain
Content:  Although the term was not coined until 1949, several philosophers of the ancient times had viewpoints similar to those who “think like a mountain”. Epicurus was one of the first ancient philosophers to view the role man plays in nature. His philosophy, Epicureanism, is a materialistic viewpoint that sought to explain the universe solely by natural causes. Lucretius was a later philosopher who had Epicurean ideals. He wrote a six book collection, De Rerum Natura, categorizing the natural word. In Book 5 of De Rerum Natura he writes: They [Roman gods] did not create the world for us [man], why should they? They did not create man, how could they? They had no conception of man until nature and 
Title: Natural philosophy
Content:  century, a treatise by Kelvin and Peter Tait, which helped define much of modern physics, bore the title Treatise on Natural Philosophy (1867). In the German tradition, Naturphilosophie (philosophy of nature) persisted into the 18th and 19th centuries as an attempt to achieve a speculative unity of nature and spirit. Some of the greatest names in German philosophy are associated with this movement, including Goethe, Hegel, and Schelling. Naturphilosophie was associated with Romanticism and a view that regarded the natural world as a kind of giant organism, as opposed to the philosophical approach of figures such as John Locke and Isaac Newton espousing a more mechanical philosophy of the world, regarding it as being like a machine.
Title: Anarcho-naturism
Content:  An important early influence on anarchist naturism was the thought of Henry David Thoreau, Leo Tolstoy and Élisée Reclus. Thoreau was an American author, poet, naturalist, tax resister, development critic, surveyor, historian, philosopher, and leading transcendentalist. He is best known for his book Walden, a reflection upon simple living in natural surroundings, and his essay, Civil Disobedience, an argument for individual resistance to civil government in moral opposition to an unjust state. His thought is an early influence on green anarchism, but with an emphasis on the individual experience of the natural world, influencing later naturist currents. Simple living as a rejection of a materialist lifestyle and self-sufficiency were Thoreau's goals, and the whole project was inspired by transcendentalist philosophy. "Many have seen in Thoreau one of the precursors of ecologism and anarcho-primitivism represented today in John Zerzan. For George Woodcock this attitude can be also motivated by certain idea of resistance to progress and of rejection of the growing materialism which is the nature of American society in the mid-19th century." John Zerzan himself included the text "Excursions" (1863) by Thoreau in his edited compilation of anti-civilization writings called Against civilization: Readings and reflections from 1999.

Question: which philosopher advocated the idea of return to nature?
Answer: Bacon.