The main factors of increasing scarcity are : 

1. Overpopulation: The increasing population requires additional land for growing additional food and providing shelter which is met through conversion of forest and into agricultural land and agricultural land into residential, commercial and industrial land. 

2. Growing industrialization : With increased industrialization, extraction of mineral ores, crude oil and water increase resulting in emptying of mines, oil wells and water sources. 

3. Expanding urban areas: Urban areas are those where a huge population lives in a small area. Naturally the demand for resources and generation of wastes is very high contributing to reduction in quantity and quality of resources. 

4. Atmospheric Pollution: With greater burning of fossil fuels like coal, diesel,’ and petrol, more harmful elements like carbon dioxide, hydrogen sulphide, soot and dust get hydrogen sulphide; soot and dust get into the air polluting it. This reduces the availability of clean air. 

5. The open space: they affect the land and water, reducing the quality as well as availability. Water is also polluted by the agricultural and household activities.