Significant alterations have been made to the biogeochemical cycles by human activities, specifically nitrogen and carbon cycles. Since the onset of the Industrial Revolution humans have contributed to a significant increase in CO2 in the atmosphere and there are no signs that they will decline in the near future (CITATION). High levels of CO2 in the atmosphere could change climate and affect plant species composition. Alterations to the biogeochemical cycles have also impacted water accessibility ,
History of Forests VII. Deforestation VIII. Conclusion IX. Endnotes X. Bibliography Forest Ecosystem I. Introduction A forest, also referred to as a wood or the woods, is an area with a high density of trees. As with cities, depending on various cultural definitions, what is considered a forest may vary significantly in size and have different classifications according to how and what of the forest is composed? These plant
The production and emission of CFCs, is by far the leading cause. Human activity is by far the most prevalent and destructive source of ozone depletion, while threatening volcanic eruptions are less common. Human activity, such as the release of various compounds containing chlorine or bromine, accounts for approximately 75 to 85 percent of ozone damage. Perhaps the most evident and destructive molecule of this description is chloroflourocarbon (CFC). CFCs were first used to clean electronic circuit
Introduction. Over the past century there have been rapid and noticeable changes in environmental conditions on Earth. These changes can be traced in various geospheres: alterations of the gaseous composition of the atmosphere, major decreases in global ice volume (Cryosphere), in both: land- and water based glaciers with consequent rise of sea-level (Hydrosphere), increase in the frequency and severity of geohazards (Lithosphere) etc. Triggering mechanisms for those changes include both: natural
CHAPTER NO: 01 1. Define the importance of Environmental Studies. Answer: Environment is derived from the French word Environ which means to encircle or surround. ENVIRONMENT is sum total of water, air, and land, inter-relationships among themselves and also with the human beings, other living organisms and property. The above definition given in Environment Act, 1986 clearly indicates that environment includes all the physical and biological surroundings and their interactions. ENVIRONMENTAL
their user. Bill Gates, Co-founder, Microsoft Corporation Long before Apple, one of our engineers came to me with the suggestion that Intel ought to build a computer for the home. And I asked him, ‘What the heck would anyone want a computer for in his home?’ It seemed ridiculous! Gordon Moore, Past President and CEO, Intel Corporation 1.1 Introduction Twelve years ago in 1996, when we prepared the first edition of