Environment in its totality - class-VIII

An ecosystem is a system formed by the interaction of all living organisms with each other and with the physical and chemical factors of the environment in which they live, all linked by transfer of energy and material.

There are many reasons as to why population growth is seen as a threat to the environment. For example, human populations use up natural resources, omit greenhouse gases contributing to climate change, destroy habitats resulting in loss of biodiversity, and increase air and water pollution levels.

• In recent years Dams and multi purpose projects have come under great opposition and scrutiny  for various reasons:
  
• 1. Regulating and damming of rivers affect their natural flow causing excessive sedimentation on the rivers beds resulting in poor habitat for the rivers aquatic life.
  
• 2.Dams also fragment rivers making it difficult for the aquatic fauna to migrate especially for spawning.
  
• 3.The reservoirs that are built on the flood plains also submerge the existing vegetation and soil leading to its decomposition over time.
  

• Eco-tourism is also known as Responsible Tourism. 
  
• It is called as Responsible Tourism because it puts responsibility on the shoulders of tourist to conserve the environment.
• It also make sure tourist and tourism activities does not disturb the local population and their livelihood.
  

• Ecology is the branch of science that deals with the study of interactions between living organisms and their physical environment.
  

• One of the best measure conserve eco-system is vanamahotsav celebration.
• Vanamahatsav is a tree planting festival celebrated annually.
• It is celebrated since 1950.
• Vanamahotsav week celebrated from July 1 - July 7 Every year

• The study of the interactions between living things and their environments is known as ecology.
  
•  In ecology, everything is connected to everything else and there is a constant interaction between organisms and their environment.
  
• Autecology is the study of individual organism or individual species. It is also known as population ecology.
  
• Autecology helps us to understand the relationships between individual plants and environment.
  

• Planktons are passively floating in upper water, nektons are actively swimming while benthos lead sedentary life upon the sea bottom. 
  
• Plankton (singular plankter) are a diverse group of organisms that live in the water column of large bodies of water and that cannot swim against a current.
  
• They provide a crucial source of food to many large aquatic organisms, such as fish and whales.
  

Mutualism is a type of symbiotic relationship where both organisms involved benefit from the interaction, which is often essential for their survival.

• Ecology is the scientific analysis and study of interactions among organisms and their environment.
  
• It is an interdisciplinary field that includes biology, geography, and Earth science.
  
• Ecology deals with the study of: a) Living beings. b) Living and non-living components. c) Reciprocal relationship between living and non living components.
  
• Ecology is distinguished from natural history, which deals primarily with the descriptive study of organisms.

• Bringing together the local communities and government agencies will help in environmental  reconstruction.
• Management of environmental resources by the Government alone is less efficient
  
• Good Governance concept of Co-operation of Government with Local communities along with civil society organizations will ensure efficient management of environmental resources
•  Also ensures Transparency and accountability in the environmental resources management

The water cycle (hydrologic cycle) is the continuous movement of water on, above, and below the surface of the Earth, which naturally purifies and replenishes water bodies.

The definition provided accurately describes the environment as the sum total of conditions and influences that surround and affect the life and development of organisms.

Tarun Bharat Singh is an Indian non-governmental organization based in Rajasthan, founded by Rajendra Singh, known for its work in water conservation and traditional water management techniques.

The World Health Organization (WHO) is the primary international agency for health. Since none of the listed options (IBRD, IMF, WTO) are health agencies, 'None of the above' is the correct choice.

The loss of biodiversity refers to the decline or disappearance of biological diversity, which can lead to the extinction of species within an ecosystem.

Climate is the long-term average of weather, typically averaged over a period of 30 years. Some of the meteorological variables that are commonly measured are temperature, humidity, atmospheric pressure, wind, and precipitation.

Religion and community is not a component of human environment.

Photosynthesis and aerobic cellular respiration are complementary processes in the carbon cycle, where one consumes carbon dioxide and produces oxygen, while the other does the reverse.

Forests plays signicant role in improving rainfall. The growing plants used to intake lot of amount of moisture from the soil and release  90% of the moisture in the atmosphere which after condensation created precipitation. On the othe hand after rainfall they used to hold the moisture in it and aslo heps the soil to hold the moisture. In this ways a cycle goes on and forest improved rainfall.

United Nations Conference on Environment and Development (UNCED), byname Earth Summit, was a conference held at Rio de Janeiro, Brazil (June 3–14, 1992), to reconcile worldwide economic development with protection of the environment

The Kigali Amendment under Montreal Protocol relating to the phase-down of the production and consumption of HFCs provided for Ambitious Phase-down. This phase down divided countries into groups one of which is that the developed countries were required to slash their use of HFCs by 10% by 2019.

The government environmental policies are made to comprehensively check the degradation of land and water through wasteland management and to provide rules and guidelines to improve the same. Provide for programs and measures to improve the quality of river waters, and to monitor and supervise the development through Environmental Impact Assessment studies which comparatively show figures and data of work done, programs utilized and funds exhausted while drawing the attention of the government to certain neglected areas of the environment.

The Montreal Protocol on substances that deplete ozone layer is a landmark international agreement held under the aegis of United Nations for protection of stratospheric ozone layer. It was signed and finalized in 1987 and subsequently amended in 1990 and 1992. It stipulates phasing out the production of substances that are responsible for ozone depletion. It was ratified by almost all countries globally and came into force on 26 August 1987. 197 countries who were the member of UN ratified this protocol.

The Montreal Protocol on substances that deplete ozone layer is a landmark international agreement held under the aegis of United Nations for protection of stratospheric ozone layer. It was signed and finalized in 1987 and subsequently amended in 1990 and 1992. It stipulates phasing out the production of substances that are responsible for ozone depletion. It was ratified by almost all countries globally and came into force on 26 August 1987. 197 countries who were the member of UN ratified this protocol.