Global Warming

The term  global warming  means increase in greenhouse effect . The greenhouse effect is a natural process by which the earth holds some of the energy of sunrays, and utilizes it to warm it enough to sustain life on it. The human activities like burning of fossil fuels, excessive smoke discharges from factories and the depletion of forests have led to an increase in the concentration of the greenhouse gases, mainly carbon dioxide, methane and nitrous oxide, in the earth’s outer atmosphere which are responsible for trapping excessive heat inside the environment and thus increasing the overall temperature of the earth, leading to the phenomenon of  global warming  .  Global warming  has emerged as one of the major threats to our planet in this century. It has been proved that due to the increase of the greenhouse gases in our outer atmosphere, the earth’s temperature has warmed by 0.74°C over the last 100 years, leading to floods, famines, droughts and cy...

Pakistan is one of the worst affected countries from climate change. The Economic Survey of Pakistan released by the federal government states that the three biggest challenges pertaining to climate change faced by the country in coming years will be related to water, food and energy security.“Pakistan is continuously suffering with extreme weather events due to changing climate that include seasonal prolonged droughts, heavy monsoon rains, devastating floods, monsoonal storms, cyclones, unusual fogs, melting of glaciers, landslides and avalanches.”Despite all these challenges, according to the survey, the good news is that the existing and proposed measures being taken by the government would help the country to address issues effectively. “Despite having high vulnerability to climatic changes in future, Pakistan is still among very low green house gas (GHG) emiting countries, however, being a responsible state and part of the international community, Pakistan is planning to ...

“ Global Warming induced by rising temperatures can badly affect Pakistan’s food production system in the shape of crop yield losses and reduced growing cycles in various climatic zones of the country,” said climate change ministry spokesperson Mohammad Saleem. He said like most developing countries, Pakistan was staring at certain food insecurity with its food production out of sync with the population growth. Food availability is further threatened by shifting weather patterns with recurring severe droughts and floods that affected the country’s overall crop production. The spokesperson explained that studies carried out by the Global Change Impact Study Centre (GCISC), the ministry’s research wing, pointed to an average temperature increase over Pakistan in the coming decades at a pace faster than that of the average global temperature increase. “The temperature rise in Pakistan may exceed by about one degree Celsius by the end of this century,” Mr Saleem cautioned, quoti...

CLIMATE change is a serious global threat and Pakistan has been ranked eighth on the list of countries most vulnerable to climate change by the German watch Global Climate Risk Index. According to a UK-based global risk consulting firm, Verisk Maplecroft, three cities of Pakistan are considered at high risk from climate change that includes Lahore, Faisalabad and Karachi. In a recent global greenhouse gas (GHG) emissions study from 2011-2015, Pakistan has been ranked 137th and has contributed only 0.47 percent of global GHG emissions, but owing to its climatic conditions it is consistently bracketed with countries that have drastic climate change effects. Pakistan is considered among countries that suffer extreme weather conditions. Pakistan was one of five nations that were badly affected by the climate change in 2014. The Pakistan Economic Survey has reported that during 2010-2012 floods more than 3,000 people were killed and resulted in loss of $16 billion. Thousands of peopl...

Climate study is very important as all life forms survive in this world due to favorable climatic conditions and any change in climate will affect all biological lives around the world by altering forests, crop yields and water supplies. Climate is the average measure of variation in meteorological variables in a particular region over long period of time (usually 30 years). These variables include temperature, humidity, atmospheric pressure, wind, precipitation, solar radiation, etc. Agriculture is the main source of feeding for whole world and Pakistan and agricultural crop production has always been dependent on climate and its variables in particular region. The key effects of climate change include changing patterns of crop production, changing patterns of rainfall, changing agricultural zones, increasing average temperatures, changing length of the seasons, floods and droughts. Pakistan has more diverse ecosystem, a varying climate ra...

Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century, and its projected continuation. Since the early 20th century, Earth's mean surface temperature has increased by about 0.8 c, with about two-thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certain that it is primarily caused by increasing concentrations of greenhouse gases produced by human activities such as deforestation and the burning of fossil fuels. These findings are recognized by the national science academies of all major industrialized nations http://webneel.com/webneel/blog/33-creative-global-warming-poster-designs-your-inspiration

A working GIS integrates five key components:  hardware ,  software , data, people, and  methods . Hardware .  Hardware  is the  computer  on which a GIS operates. ... Software . GIS  software  provides the functions and tools needed to store, analyze, and display geographic information. ... Data. ... People. ... Methods .