This article provides a paragraph on cholera especially written in Hindi language. जब कभी बड़े-बड़े सम्मेलन होते हैं, मेला लगता है, जहाँ लोगों की भीड़-भाड़ अधिक होती है ऐसे स्थानों पर हैजा होने की संभावना ज्यादा होती है । इसका मुख्य कारण साफ-सफाई का नहीं होना है, जिससे भोजन दूषित होता है । जल प्रदूषित होता है और लोगों द्वारा [...]
This article provides a paragraph on well irrigation. The amount of water stored in the earth's crust is estimated to be around 8 billion cubic kilometres, half of which is at depths less than 800 metres. This volume of water is about 35 times the combined storage of all the world's rivers, fresh water lakes, reservoirs and inland seas. Ground [...]
This article provides a paragraph on rivers. Rivers have always played an important role in shaping civilisation. Besides supplying water, rivers also provide means of transportation, recreation, hydropower generation and waste disposal. However, rivers have also generally caused problems of flooding, change of course resulting in migration of people, loss of properties, etc. Rivers can be classified in the following [...]