what i water scarcity and explain its two main causes?
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This article is about security. For the American film, see National Security (2003 film). For the South Korean film, see National Security (2012 film).
"National defense" redirects here. For other uses, seeNational defense (disambiguation).

Security measures taken to protect the Houses of Parliament in London,UK. These heavy blocks of concreteare designed to prevent a car bomb or other device being rammed into the building.

President Reagan in a briefing with National Security Council staff on theLibya Bombing on 15 April 1986
National security refers to the security of anation state, including its citizens, economy, and institutions, and is regarded as a duty of government.
Originally conceived as protection againstmilitary attack, national security is now widely understood to include non-military dimensions, including the security fromterrorism, crime, economic security, energy security, environmental security, food security,cyber security etc. Similarly, national security risks include, in addition to the actions of other nation states, action by violent non-state actors, narcotic cartels, and multinational corporations, and also the effects of natural disasters.
Governments rely on a range of measures, including political, economic, and militarypower, as well as diplomacy to enforce national security. They may also act to build the conditions of security regionally and internationally by reducing transnationalcauses of insecurity, such as climate change,economic inequality, political exclusion, andnuclear proliferation.
Definitions
Dimensions of national security
Issues in national security
Country-by-country perspectives
See also
References
Further reading
External links
Watch this page
Read in another language
This article is about security. For the American film, see National Security (2003 film). For the South Korean film, see National Security (2012 film).
"National defense" redirects here. For other uses, seeNational defense (disambiguation).

Security measures taken to protect the Houses of Parliament in London,UK. These heavy blocks of concreteare designed to prevent a car bomb or other device being rammed into the building.

President Reagan in a briefing with National Security Council staff on theLibya Bombing on 15 April 1986
National security refers to the security of anation state, including its citizens, economy, and institutions, and is regarded as a duty of government.
Originally conceived as protection againstmilitary attack, national security is now widely understood to include non-military dimensions, including the security fromterrorism, crime, economic security, energy security, environmental security, food security,cyber security etc. Similarly, national security risks include, in addition to the actions of other nation states, action by violent non-state actors, narcotic cartels, and multinational corporations, and also the effects of natural disasters.
Governments rely on a range of measures, including political, economic, and militarypower, as well as diplomacy to enforce national security. They may also act to build the conditions of security regionally and internationally by reducing transnationalcauses of insecurity, such as climate change,economic inequality, political exclusion, andnuclear proliferation.
Definitions
Dimensions of national security
Issues in national security
Country-by-country perspectives
See also
References
Further reading
External links
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Hello mate!!!
....
water scarcity:-
It is the phenomena which is caused by shortage of water.
it's main causes:-
Economic water scarcity is caused by a lack of investment in infrastructure or technology to draw water from rivers, aquifers or other water sources, or insufficient human capacity to satisfy the demand for water. One quarter of the world's population is affected by economic water scarcity.
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