Today is our topic of discussion Green House Effect
Green House Effect
Definition of ‘global warming’:
Global warming refers to the gradual rise in earth’s temperature as a result of accumulation of Green House Gases (GHGs) in the atmospheres. The gases trap the heat instead of radiating it into the space with resulting warming of the globe.
Cause of Global Warming:
Partly natural and partly because of a number of human activities causing excess emission of GHGs due to increasing fossil fuel burning, industrial process. deforestation and land use pattern changes, livestock feeding practices, wet paddy cultivation, use of synthetic products (e.g. refrigerants), and particular lifestyle and consumption behaviour.
A number of green house gases such as methane, carbon-dioxide, nitrous oxide, chlorofluoro- carbon (CFC) etc. can trap solar radiation. These GHGs allows trapping of heat and cause the earth’s surface to be warmer. at impart to agistes aben miciel alles bons & Im0.8
Green House:
A green house is a large hall with glass roof and sides. This greenhouse allows the sunrays to enter and retains some of the temperature within the house itself. Sunlight enters it in radiation through transparent glass.
Green House Effect:
The green house effect is the heating effect exerted by the atmosphere upon the earth by virtue of the fact that the atmosphere absorbs and re-emits the radiation from the earth which becomes warmer or cooler mainly because of the effect of sunlight.
Impact of green house effect on health:
1. Temperature-related illnesses and death – Increase in the number of deaths due to greater frequency and severity of heat waves and other extreme weather events.
2. Extreme rise in the temperature will affect people living in the urban areas more than those in the rural areas due to the presence of concrete constructions, paved and tarred roads.
3. Death and injury due to flooding, drowning, diarrhoeal and respiratory diseases.
4. Reduced availability of fresh water due to saltwater intrusion.
5. Scarcity of water due to drought will lead to favorable environment for water and food contamination resulting in increased water and food-borne diseases.
6. Hunger and malnutrition leading to impaired child development and decreased adult activity.
Green house effect on Bangladesh:
1. If the seawater rises by three feet due to global warming at least one tenth of Bangladesh will
go under water (2030). Barishal and Khulna will become separate islands and the seacoast will come up to Chandpur, Faridpur and Jessore.
2. If the seawater rises by six feet, low area of Faridpur will be part of the sea (2050).
3. If water level rises by nine feet, southern portion of Dhaka and Haor-Baor area of Comilla, Sylhet will be part of the sea.
Measures to reduce green house effect:
1. To stop / decrease the production of ozone gas producing technology by decreasing use of air conditioner, refrigerators, aerosols, etc. having CFC. choul to soltasti
2. Decreased production of electricity by using fossil fuel, it produces sulphur dioxide which after mixing with atmosphere will produces acid rain. sowne of grilnooo A
3. Decreased use of petrol and petroleum products and use of low petrol consuming automobiles – Combustion of one gallon of petrol yields 20 pounds of carbon dioxide.
4. Increased tree plantation and conservation of the existing forest area – 10 lakh trees can remove one crore (10 million) pounds of green house gas.
5. More effort should be taken to produce and use of solar energy, hydraulic energy and wind- mill energy.
6. Reduction of use of chemical fertilizer and increased use of natural fertilizer.
7. Cheap substitution of CFC and minimizing/stopping the use of CFC. 8. Construction of coastal embankment.
9. Developed countries should restrict their activities responsible for producing green house gases and help the developing countries to do so.
10. International collaborative studies and research in reduction of green houses gases. 11. Political commitment for reduction of green house gases.
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