subject: Global Warming And Mechanism [print this page] Introduction to Speech about Global Warming:
Global warming is a recently evolved, insidious anthropogenic disaster. It is the documented historical warming of Earth's near-surface temperature. Global warming came into existence in mid 20th century and has been progressing at an unprecedented rate ever since. Global warming is sometimes used synonymously with the term "climate change". However a basic difference exists between the two. Climate change is identified state of change of climate which persists for a decade or longer, whereas Global warming is the combined effect of man made green house gases and change in solar irradiance. Global warming has emerged as a humongous problem facing the fast and ever growing world.
Speech about Causes of Global Warming and Mechanism
As mentioned earlier, it is a combined effect. Over the years of development of new and improved products for living, their has been an neglected, unwanted rise in gases that are causing gradual destruction of the protective blanket around our globe i.e. the Ozone layer. Global warming is an uncalled for event following employment of harmful greenhouse gases such as Carbon Dioxide (CO2), Nitrous Oxide (N2O), , Methane (CH4), and aerosols such as Chlorofluorocarbons (CFC), Hydrocarbons (CHC), etc.
These gases form O. free radicals which combine with Ozone and convert it to O2 and other non-protective gases. Thus solar energy which was impermeable to the Earth's atmosphere due to the unyielding Ozone layer, is clear of all the obstacles.
Speech about Effects and Control of Global Warming
According to the World Meteorological Organization (WMO), the decade of the 2000s (20002009) is the warmest on record. The global mean surface temperature for 2009 is currently estimated at 0.44C/0.79F above the 1961-1990 annual average of 14.00C/57.20F. Global warming is a potential health hazard.
The deadly effects of global warming include
Polar Ice Caps melting will raise sea levels and throw global ecosystem out of balance.
Increased probability of draught and heat waves.
Increased incidence of hurricanes leading to disruption of ecology, loss of lives and damage to property.
High prevalence of cancers, especially skin cancers, in areas which have thin Ozone layer Eg: Australia
Economic consequences due to impending disasters.
Speech about Control of Global Warming
Every individual can participate in protection of our environment. The WHO slogan "Think globally. Act locally" is the biggest proof that all of us can help in saving our Mother Earth from the deleterious effects of Global warming. The cumulative efforts will make a huge difference to the present pathetic conditions. The measures we can take are:
Switch to energy efficient appliances
Turn off air conditioners when not in use
Have a solar water heater
Recycle often
Use eco-friendly products
Be a catalyst. Talk, encourage and participate in local movements
Plant more trees
Use renewable sources of energy
by: jeri
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