The five farming techniques which helps in soil conservation are:

1. Strip Cropping:  To counter the effect of wind the practice of strip cropping is followed to stop wind erosion. Large fields are divided in strips. Grass in strips is left to grow between the crops.
2. Contour Ploughing: Ploughing along the contour lines does not let water run down the slopes. This technique involved ploughing along contours, so that the furrows follow lines linking points of the same height. Such furrows halt the downward flow of water and reduce erosion.
3. Terrace Farming: Since ancient times farmers have built terraces or steps up a hillside creating several levels of farms. Hill slopes are cut into a number of terraces having horizontal top and steep slopes on the back and front.
4. Crop Rotation: If the same crop is sown in the same field year after year, this consumes particular nutrients from the soil, thus making it infertile. Crop rotation can check the type of erosion.
5. Shelter Belts: Planting trees to create shelter also works in a similar way. Rows of such trees are called shelter belts. These shelter belts have contributed significantly to the stabilization of sand dunes and in establishing the desert in western India.

In Sorrieu's utopian vision, the peoples of the world are grouped as distinct nations, identified through their flags, and national costumes. Sorrieu created the image to unify the disintegrated states into a nation state under a democratic constitution

Sustainable economic development means development should take place without damaging the environment so that the developmental process in the present should not compromise with the needs of future generations. Two ways in which resources can be used judiciously are

1. Resource planning: Resource planning refers to the strategy for planned and judicious utilisation of resources. Resource planning is essential to bring about sustainable existence which is a part of sustainable development. 
2. Resource conservation: It is the ethical use and protection of valuable resources such as trees, minerals, wildlife, water and others. It focuses on maintaining the natural world in order to protect the sources of resources.

Health, education, pollution-free environment, drinking water facility etc. are the non-monitory goals, these are the aspirations of people which they want to have but it cannot be measured in monetary terms and usually provided by the government.

Net sown area represents the total area sown with crop in a year on the other hand cultivable land is that which is capable of being ploughed and used to grow crops.

Both Belgium and Sri Lanka are democracies, yet they have dealt with the problem of regional and linguistic diversity very differently.  In Belgium:  1. The leaders recognised the existence of regional differences and cultural diversities.  2. Between 1970 and 1993, they amended their constitution four times so as to work out an arrangement that would enable everyone to live together within the same country.  3. Dutch and French communities have equal representation in the Central government; many of the powers of the central government have been given to the state governments. 4. In addition to these, both language communities have the third kind of Government called Community Government which has power regarding cultural, educational and language-related issues.  Whereas, in Sri Lanka:  1. The democratically elected government adopted a series of majoritarian measures to establish Sinhala supremacy.  2. In 1956, an Act was passed to recognize Sinhala as the only official language, thus disregarding Tamil.  3. The Governments followed preferential policies that favoured Sinhala applicants for university positions and government jobs.  4. A new constitution stipulated that the state shall protect and foster Buddhism.