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I am Savita Dhutti,a science teacher at a well established public school in India.I welcome all of you to My science mania ! Its a website,I created for sharing e-learning experience with my students.Science is in fact, a real fun.It is a subject never--never confined within the four walls of the clssroom.Science is a continuous process of learning! I wish to create a pleasing learning environment for my students.So, Come and ENJOY Science with me.

Sunday, 29 July 2007

Environmental effects of petroleum


Environmental effects

Diesel fuel spill on a roadThe presence of oil has significant social and environmental impacts, from accidents and routine activities such as seismic exploration, drilling, and generation of polluting wastes no produced by other alternative energies.


[edit] Extraction
Oil extraction is costly and sometimes environmentally damaging, although Dr. John Hunt of the Woods Hole Oceanographic Institution pointed out in a 1981 paper that over 70% of the reserves in the world are associated with visible macroseepages, and many oil fields are found due to natural leaks. Offshore exploration and extraction of oil disturbs the surrounding marine environment.[13] But at the same time, offshore oil platforms also form micro-habitats for marine creatures. Extraction may involve dredging, which stirs up the seabed, killing the sea plants that marine creatures need to survive.


[edit] Oil spills

Volunteers cleaning up the aftermath of the Prestige oil spillCrude oil and refined fuel spills from tanker ship accidents have damaged natural ecosystems in Alaska, the Galapagos Islands , and many other places and plural times in Spain (i.e. Ibiza).