Lífsferlis

Lífsferlis, also known as the biosphere, is the global sum of all ecosystems. It is the zone of life on Earth, including the biosphere proper, the sum of all the planet's ecosystems, and the zone of life in the Earth's crust, oceans, and atmosphere. The biosphere is a thin layer of the Earth's surface that supports life. It extends from the deepest roots of trees to the dark environment of deep-sea vents and hydrothermal vents, and from the highest mountaintops to the coldest glaciers.

The biosphere is composed of several layers, including the lithosphere, hydrosphere, atmosphere, and the biosphere proper. The lithosphere is the solid part of the Earth, including the crust and upper mantle. The hydrosphere is the water component of the Earth, including oceans, lakes, rivers, and groundwater. The atmosphere is the layer of gases surrounding the Earth. The biosphere proper is the sum of all ecosystems, including terrestrial, freshwater, and marine ecosystems.

The biosphere is home to an estimated 8.7 million species of plants, animals, and microorganisms. It plays a crucial role in maintaining the Earth's climate, recycling nutrients, and providing resources for human survival. The biosphere is also a source of inspiration for art, literature, and philosophy, reflecting humanity's deep connection to the natural world.

The biosphere is under threat from various human activities, including climate change, pollution, habitat destruction, and overexploitation of resources. Conservation efforts are crucial to protect and preserve the biosphere for future generations. Understanding the biosphere is essential for sustainable development and the well-being of all living organisms on Earth.