Human interventions have altered natural systems

Human intervention has caused widespread climatic changes and alterations, like permafrost thawing, around the globe, many of which can be observed. These observed impacts include changes to the physical global system, such as shrinking glaciers and lakes and rivers warming. Biological systems are also impacted in a variety of ways such as birds arriving earlier during migration periods, blooming of plants earlier in the spring, and plant and animal species moving towards Earth's poles. In places such as oceans, lakes, and rivers, fish and plankton are shifting from cold-adapted to warm-adapted communities. Other forces, such as using forests for agriculture, have significant influence on the observed impacts. Human are greatly influencing climatic change through the emission of greenhouse gases. The warming has caused physical and biological systems to change that is observable at a global scale.








Human Intervention Causing Global Warming


Global warming is happening through the burning of fossil fuels which release green house gases and carbon dioxide in the atmosphere which causes increase in global temperatures. Human consumption of fossil fuels have increased in the past few years that has, in turn, increased the amount of harmful gases that is causing the depletion of the invisible ozone layer in the upper atmosphere, in turn, increasing the amount of UV rays that reach the earth's surface.

The sun's energy is absorbed by the earth. The earth re-emits the energy back as heat. As the concentration of the green house gases and carbon dioxide increase, more and more of the heat is trapped, keeping the heat from escaping.

Some facts about Global Warming:

• During the last 100 years, global sea levels have increased 4 to 8 inches.



• Earth's temperature has increased 1 degree Fahrenheit in the last century.



• The past 50 years of warming has been attributed to human activity.



• The United States was responsible for 20 percent of global green house gases in 1997.



• Warmer weather provides breeding grounds for insects such as malaria carrying mosquitoes.

Our Part As Humans

Apart from being responsible for ourselves and our loved ones, each of us has a responsibility towards Mother Nature and our environment. We have no liberty to do what ever we like with the environment. It is not ours to treat as we please. As being part of the environment, we have a responsibility towards it. Since we hold it in trust, we have to manage it responsibly, not just for our own benefit but for later generations, of ours and all other species of this Earth.









Sources Used:

http://www.panda.org/about_our_earth/aboutcc/problems/impacts/
http://orthodoxwiki.org/Global_Warming
http://www.physicsforums.com/archive/index.php/t-66880.html
http://webpages.csus.edu/~bm884/global-warming.jpg


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