The glob is heating up. Both lands and oceans are being warmed. The rise in temperature is global warming.
The increase in temperature of atmosphere, oceans and land masses of earth is global warming. The Earth has warmed and cooled many times in the history of 4.65 billion years. The average surface of temperature of earth is about 15 °C to 59 °F, over last 100 years, it’s atmosphere has warmed by 0.74 °C over last century. At present, Earth is facing rapid warming. Human beings and human activities are responsible for a worldwide average temperature increase of between 0.8 and 1.2 °C (1.4 and 2.2 °F).
- When Carbon dioxide and other air pollutants and greenhouse gases are collected in the atmosphere, it causes global warming. Sunlight and Solar radiations that have bounced off the Earth’s surface. Normally, this radiation would escape into space – but these pollutants can last for years to centuries in the atmosphere, trapping heat and cause the plants to get hotter.
- The main cause of global warming is the greenhouse gases. They are Carbon dioxide (CO2), Methane (CH4), Ozone (O3), and Nitrous oxide (NO2). The radioactive equilibrium in the atmosphere is being changed due to continuous increase in the gases.
- The burning of fossil fuels like coal and oil are also major causes of global warming.
- Excessive smoke discharged from factorize, deforestation i.e removal of trees for acquiring lands, have lead to an increase in the concentration of greenhouse gases which are responsible for trapping excessive heat inside the environment. Global warming is caused by this too.
- Melting glaciers, early snow melt, and droughts will cause more water shortage and increase the risk of wildfires in the American West.
- Rising sea levels will lead to coastal flooding.
- Troublesome new pests, heat waves, heavy downpours and increase flooding will be faced by forests, farms, and cities.
- All these factors will damage and destroy agriculture and fisheries.
- Allergies, asthma and infectious diseases will be common because of increase in growth of pollen producing ragweed, higher levels of air pollution and the spread of favorable conditions for pathogens and mosquitoes.
Impacts on Environment
- Shrinking habitats (forest and wetlands)
- Damage to aquatic ecosystems.
- Upward migration of plants and animal species.
- Extinction of certain species.
- Change in growing season of plants.
Extremities in Weather
- Cyclones and hurricanes.
- Floods and heavy snowfall.
- Severe droughts.
- Long summers and short winters.
Impact on Water Reservoir
- Melting of glaciers.
- Decrease in fresh water supply.
- Rising sea levels.
There are many greenhouse gases such as Carbon dioxide (CO2), Methane (CH4), Nitrous oxides (NO2), Fluorinated industrial gases: Chlorofluorocarbons ( CFCs), Hydro-fluorocarbons (HFCs), Per fluorocarbons (PFCs) and Sulphur hexafluoride (SF6).
Human activities are mainly responsible for the emission of greenhouse gases. There are many G.H.G. Most common is Carbon dioxide (CO2). Major factors for producing this gas is burning of fossil fuels like coal and oil. Manufacturing of Cement is also responsible for it as by heating Calcium carbonate (CACO3), Lime (CaO) and carbon dioxide (CO2) is released. Moreover, deforestation i.e removal of trees for acquiring Lands also cause more amount of Carbon dioxide. The second main gas is Methane (CH4), also known as natural gas. It is produced as a result of agriculture activities such as livestock digestion, paddy rice farming and use manure. Also produced due to improper management of waste. Nitrous oxides are mainly generated by fertilizers. Moreover, Fluoridated gases like Chlorofluorocarbons (CFCs) are result of various industrial processes and refrigeration. These gases are playing viral role in global warming. They are continuously causing an increase in the Earth’s temperature.
While other planets in the Solar System are either bitterly cold or roasting hot, Earth’s surface has relative mild, steady temperatures. Earth enjoy these temperatures because of it’s atmosphere, which is the thin layer of gases which protect and cover the planet. However 97% of Scientist and research agree that humans are responsible for the change in Earth’s atmosphere. The natural greenhouse effect normally traps some portion of heat in such a way that our planet is safe from reaching freezing temperature. While human enhanced to burning of fossil fuels which increase the amount of greenhouse gases.