Sustainability means meeting our own needs without compromising the ability of future generations to meet their own needs. In addition to natural resources, we also need social and economic resources. Sustainability is not just environmental- ism.
Renewable clean energy is probably the most obvious example of sustainability. Here are three examples. Solar energy: Once the sun's electromagnetic radiation is captured, it produces electricity and heat. Wind Energy: Wind turbines convert the kinetic energy in the wind into mechanical power.
Sustainability is the capacity to endure in a relatively ongoing way across various domains of life. In the 21st century, it refers generally to the capacity for Earth's biosphere and human civilization to co-exist. It is also defined as the process of people maintaining change in a homeostasis-balanced environment, in which the exploitation of resources, the direction of investments, the orientation of technological development, and institutional change are all in harmony and enhance both current and future potential to meet human needs and aspirations. For many in the field, sustainability is defined through the following interconnected domains or pillars: environmental, economic and social. Sub-domains of sustainable development have been considered also: cultural, technological and political.
Modern use of the term "sustainability" is broad and difficult to define precisely. Originally, "sustainability" meant making only such use of natural, renewable resources that people can continue to rely on their yields in the long term.
Moving towards sustainability can involve social challenges that entail international and national law, urban planning and transport, supply-chain management, local and individual lifestyles and ethical consumerism. Ways of living more sustainably can take many forms, such as:
reorganizing living conditions (e.g., ecovillages, eco-municipalities, and sustainable cities)
reappraising economic sectors (permaculture, green building, sustainable agriculture) or work practices (sustainable architecture)
using science to develop new technologies (green technologies, renewable energy and sustainable fission and fusion power)
designing systems in a flexible and reversible manner
adjusting individual lifestyles to conserve natural resources
Despite the increased popularity of the use of the term "sustainability", the possibility that human societies will achieve environmental sustainability has been, and continues to be, questioned—in light of environmental degradation, climate change, overconsumption, population growth and societies' pursuit of unlimited economic growth in a closed system.