Many people are still unaware about the changes in the overall climate of the planet. Human emissions of carbon dioxide and other greenhouse gases are posing an unprecedented threat to the future of life on Earth. Recent observations suggest that the planet has experienced the largest increase in surface temperature over the last 100 years. The continuous rise in temperature of the planet is really upsetting and will severely affect ecosystems and disturb ecological balance and the fundamental cause for the rapid climate change is global warming. Global warming is caused due to human activities such as industrialization and burning of fossil fuel thereby releasing uncontrolled emission of green house gases. Fossil fuels are being continuously used to produce electricity. The burning of these fuels produces gases like carbon dioxide, methane and nitrous oxides which lead to global warming. It is the considered to be the root cause of rising sea level, flooding, changes in weather patterns, storms, cyclone, epidemic diseases, lack of food, death, etc. Melting of polar ice caps will lead to floods which can cause mayhem everywhere. Rise of sea levels will devastate agricultural and fishing activities. Hence appropriate measures must be taken to tackle this problem.
Global warming has impacted the nature’s balance, biodiversity and climatic conditions of the earth over decades. Another cause of global warming is the ozone depletion. The ozone layer protects the earth surface by inhibiting the harmful sun rays to coming to the earth. However because of the gradually declining ozone layer , ultraviolet sun rays are entering to the biosphere and get absorbed by the green houses gases which ultimately increase the global warming. The process of global warming begins when sunlight reaches the Earth. The clouds, atmospheric particles and surface of oceans then sends back sunlight back into the space, whilst the remaining is absorbed by oceans, air and land. This heats up the surface of the planet and atmosphere, making life feasible. As the Earth warms up, this solar energy is radiated by thermal radiation and infrared rays, propagating directly out to space thereby cooling the Earth. However, some of the outgoing radiation is re-absorbed by carbon dioxide, water vapours, ozone, methane and other gases in the atmosphere and is radiated back to the surface of Earth and are commonly known as greenhouse gases. The concentration of greenhouse gases in the atmosphere was artificially increased by humankind at an alarming rate since the past two centuries. According to a study, over 8 billion tons of carbon dioxide was pumped, huge amounts of methane gas are generated in landfills and agricultural decomposition of biomass and animal manure, nitrous oxide is released into the atmosphere by various nitrogen-based fertilizers including urea and ammonium phosphate and other soil management utilization . As a result, thermal radiation is further hindered by increased levels of greenhouse gases.
We must solve the issue of global warming by spreading social awareness among people about global warming to get it eradicated from worldwide and make the possibilities of life on earth forever as usual.