essay on global warming or school library
Answers
Answer:
In recent past, global observations have provided clear evidence of climatic changes resulting from anthropogenic activities. According to a report from World Watch Institute (1992), the earth’s surface was warmest in 1990. Six of seven warmest years on record have occurred since 1980.
Observations on temperature at many places of the world over the last century show an average increase of about 0.5°K. This is supported by Palaeo-climatic evidence gathered from deep-sea ice-cores from Arctic and Antarctic regions. While the primary cause of an increase in global temperature in the past has been increasing concentration of CO2, fossil fuel burning, extensive deforestation, rapid increase in chlorofluorocarbons (CFCs) has further complicated the global environmental problems.
clip_image002
The minor gaseous constituents more commonly known as trace gases or greenhouse gases (GHGs) like CO2, Clox, CH4, N2O, NOX, O3 CFCs etc., though occur in traces but play a surprisingly dominant role in regulating the entire earth’s atmosphere.
Greenhouse effect:
These gases act as the glass plans of a greenhouse which allow solar radiations to pass through and heat the surface of the earth but do not allow the heat radiated from the ground to pass through thereby trapping it in the process. This heat trapping phenomenon is known as green house effect.
Environmental effects of global warming:
According to Stockholm Environment Institute, all natural ecosystems can tolerate a rise by 0.1 °C of temperature per decade. However, further rise in temperature has been calculated to pose serious environmental consequences.
(1) Many species particularly plants would be unable to migrate to new and some suitable habitats, leading to rapid loss of biological diversity and natural resources of economic importance.
(2) The increase in temperature will cause more frequent storms to many parts of the world, including regions that have experienced no such activity earlier.
(3) Rainfall and monsoon patterns could shift dramatically as the planet warms. Some regions of the world could dry out while others could receive too much rains- flooding rivers and increasing soil erosion.
(4) An increase in temperature shall cause the oceans to expand. Rising sea-levels shall flood many highly productive areas of the world like Bangladesh, Egypt, Indonesia, China and India.
(5) Glaciers and ice-caps shall melt contributing further in the rise’ of sea- level.
(6) Rise in sea-level is a threat to the very existence of several island countries in the Pacific, Indian Ocean and Caribbean’s.
(7) Global warming could seriously disrupt marine ecosystems. The flooding of many coastal wetlands would mean the loss of breeding grounds of fish, shrimps and birds.
(8) Groundwater supplies in several parts of the world could become contaminated with seawater.
Answer:
School Library
We can not always buy all the books we want. Our house is not big enough to fit all the books we prefer to read nor are we going to read a book that has been already gone through. This is where a library comes in use. A library is a book heaven where millions of book of hundred of genres are found. Ranging from study materials to leisure content are available in a library. One can borrow books from the library for a short duration and return it back in the same condition.
Most schools have libraries to help instill a reading habit in children. School libraries are a miniature of the public library, having fewer books in comparison. The books are also filtered in the school library, only having books that are suitable for the students below eighteen years. The schools also lend study materials to its students in time of exams and dictionaries during class hours. One can also donate our old books which are no longer in use to the library which may come in handy for the people who need them.
A library not only helps us read books without spending too much money, but also widens the quantity of reading.