Change is the only constant in life. Though this philosophy is dated back to 500BC, still today its relevance hasn’t even decreased by a dime. Time changes, Tradition changes, Culture changes, Custom changes, People changes, their Priority changes, so does the Nature and its constituents. In fact, Change is so pervasive in human lives and livelihood that it almost defeats all descriptions and analysis in every possible way.
The world that we know today, it was neither the same some 1000 years back in past, nor will it be the same some 1000 years from now in future. It has incurred several significant changes in terms of its geology, demography, topography and climate too. Our planet’s climate has changed throughout the history. Sometimes it changes due to continental drift, sometimes it is the eruption of volcanoes that brings out the changes in climate. From the ocean currents to the comets and meteorites, reasons are a plenty for Climate Change, but today the world is collectively worried because these changes have been alarmingly speeded up due to many uncontrolled human activities.
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Climate change is already having several observable effects on our environment globally. The most significant among them is the steep rise of earth’s average temperature in recent times. The rise of 2o Fahrenheit in 20th Century might sound small in magnitude but, this actually is an unusual event in our planet’s history. The current global warming trend is of peculiar significance because most of it is sadly attributed to be the result of human activities since 1950s.
The anthropogenic activities have fast tracked the climate change on our planet. Heat waves, heavy rainfalls, floods and extreme weather conditions are occurring too frequently in many parts of the world. The trickle-down effects of climate change are adversely affecting the human health, agriculture, forestry and tourism in multiple ways.
The main cause of global warming or climate change per se is the human expansion of “Green-House” effect. Technically, the Green-House effect may be defined as absorbing of heat escaping from the earth’s atmosphere and radiating the same towards the surface of earth. The gases which contribute to green-house effect include – CO2, N2O, H2O, CH4 and CFCs (Chlorofluorocarbons).
On Earth, human activities are enhancing the natural greenhouse quite steeply. The industrial activities that our civilization heavily depends upon have raised the atmospheric levels of several greenhouse gases like CO2, methane and nitrous oxide manifolds.
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