Tag: natural resources - air, water and land

Rain, wind, ice and temperature changes break the tough, hard parent material or rocks. This process is very slow but it steadily continues. Such broken parts are further withered by same factors as well as some other factors as acids etc. Therefore, wind, water and the Sun are involved in soil formation. 

Polythene bags are not involved in soil formation. However, plastic bags are threat to environment, because these bags are non-degradable, i.e., do not decay and thus, do not lead to soil formation.

• Soil nature is described in pH values. It can be alkaline, acidic or neutral. 
• Highly acidic and highly saline soil often remains injurious for plant growth, microorganisms, etc. 
• Soil pH strongly affects microbial activities. Neutral or slightly acidic soil (5.5-6.5) remains best for the growth of the majority of plants.

The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometres above Earth, which shields the earth from the sun's harmful ultraviolet radiations. Ozone gas is present in 10 ppm in this ozone layer.