Nature

Nature is the physical universe and all life within it, encompassing phenomena from the subatomic particle to the cosmos. It exists independently of human activity, though is profoundly shaped by it. This domain includes the geosphere, hydrosphere, atmosphere, and biosphere, interacting through complex systems.

Definition and scope

The term defies a single definition but broadly refers to the inherent qualities and collective phenomena of the physical world. In Western philosophy, thinkers from Aristotle to Baruch Spinoza have grappled with the concept of physis, while Eastern traditions like Daoism emphasize harmony with the natural order. The scope ranges from wilderness areas untouched by Homo sapiens to the built environments of cities that operate within natural laws. The study of these laws falls primarily to the natural sciences, including physics, chemistry, geology, and biology.

Physical properties and phenomena

The fundamental constituents of the universe are governed by the Standard Model of particle physics and the force of gravity, as described by Albert Einstein's theory of general relativity. Key phenomena shape the Earth's systems: plate tectonics drives the formation of mountains and earthquakes, while solar radiation powers the climate system and weather patterns like hurricanes and monsoons. The water cycle circulates H2O between oceans, atmosphere, and land, and electromagnetism underlies phenomena from lightning to the aurora borealis. Celestial events, such as those observed by the Hubble Space Telescope, including supernovae and black holes, are also intrinsic aspects.

Life and biodiversity

Life, a defining feature, emerged on Earth over 3.5 billion years ago, with Charles Darwin's theory of evolution by natural selection explaining its diversification. Biodiversity is cataloged through taxonomy, from Archaea in hydrothermal vents to the vast rainforests of the Amazon Basin. Key biological processes include photosynthesis, discovered in part by Jan Ingenhousz, and cellular respiration. Ecosystems like the Great Barrier Reef, Serengeti, and Siberian Taiga demonstrate intricate interdependence. Major events like the Permian–Triassic extinction event have reshaped life's trajectory, with current diversity studied by organizations like the International Union for Conservation of Nature.

Human relationship and impact

The human relationship has evolved from the Paleolithic hunter-gatherer societies to the Agricultural Revolution and the Industrial Revolution. This interaction has yielded both cultural appreciation, as seen in the works of William Wordsworth and Hokusai's *The Great Wave off Kanagawa*, and profound alteration. The Holocene extinction, deforestation of the Congo Rainforest, anthropogenic climate change (studied by the Intergovernmental Panel on Climate Change), and pollution of the Ganges River and Great Pacific Garbage Patch are significant impacts. Resource extraction for energy development, from the Brent Crude oil field to the Three Gorges Dam, further transforms landscapes.

Conservation and environmentalism

Efforts to protect and restore integrity arise from recognizing these impacts. The modern environmental movement gained momentum with works like Rachel Carson's *Silent Spring* and events like the first Earth Day. Key strategies include establishing protected areas such as Yellowstone National Park and the Galápagos Islands, legal frameworks like the Clean Air Act and the Convention on Biological Diversity, and international agreements like the Paris Agreement. Organizations like the World Wildlife Fund, Greenpeace, and the United Nations Environment Programme advocate for sustainability, while concepts like rewilding and the Circular Economy model seek to reduce the human footprint.