Herbivores: Level 2 of the trophic chain consists of organisms that consume primary producers. Such species are often termed herbivores. Herbivores may be very small organisms such as zooplankton that graze on microscopic plants such as phytoplankton; however‚ herbivores also include many enormous mammals such as rhinoceri and elephants. If significant numbers of the herbivore trophic level are removed‚ plant growth may exceed the balance found in the previous natural environment. For example the
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| |Course Title: |Course Code: Econ |No pre-requisite | | |ECONOMICS WITH TAXATION AND LAND REFORM | |
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Need to shift from modern agriculture to sustainable agriculture Agriculture has been a way of life and continuous to be the single most important livelihood of the masses. The performance of agriculture sector influences the growth of Indian economy. Though the share of agriculture in national income has been come down since the inception of planning era in economy but still it has substantial share in GDP (Gross Domestic Product). Agriculture including allied activities accounted for 14.5 percent
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further north. Cold temperatures prevent re-evaporation of these POPs‚ leaving the Arctic on the receiving end of this cycle (Plotkin‚ 2007). Secondly‚ polar bears are on the top of the food chain‚ which makes them vulnerable to the effects of biomagnification. Concentrations of POPs increase with every step up the food chain and are many times higher than those in their prey. The Stockholm Convention‚ an international legally binding agreement on persistent organic pollutants‚ requires that environmental
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MERCURY -Image of periodic table with Element bolded Atomic weight |v | |d | |e
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The Hudson River and PCB Pollution The Hudson River and PCB Pollution The Hudson River is a body of water that stretches for 315 miles from the Adirondack Mountains to the Battery in Manhattan‚ reaching its deepest point of 216 feet in the Highlands near Constitution Island and West Point and reaches its widest point of 3 miles across at Havestraw. This river is one of the most beautiful and scenic of the Tri-State area. Unfortunately‚ it happens to be New York ’s most polluted river. The river
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------------------------------------------------- Pollution The litter problem on the coast ofGuyana‚ 2010 Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution
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Pollution is the introduction of contaminants into a natural environment that causes instability‚ disorder‚ harm or discomfort to the ecosystem i.e. physical systems or living organisms. Pollution can take the form of chemical substances or energy‚ such as noise‚ heat‚ or light. Pollutants‚ the elements of pollution‚ can be foreign substances or energies‚ or naturally occurring; when naturally occurring‚ they are considered contaminants when they exceed natural levels. Pollution is often classed
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TOPIC 5 ECOLOGY 5.1.1 The study of the interactions between organisms and their environment. ENVIRONMENT = all the factors that affect an organism. 5.1.1 ABIOTIC FACTORS = non-living factors in an environment BIOTIC FACTORS = living factors in an environment ABIOTIC BIOTIC water fish chemicals in water aquatic plant depth fungi temperature protists - algae light Relationship - Photosynthesis Wet lands = also called ‘estuary’ Ecosystem: - A stable‚ settled
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Environmental issues are harmful effects of human activitity on the biophysical environment. Environmentalism‚ a socialand environmental movement that started in the 1960s‚ addresses environmental issues through advocacy‚ education and activism. The carbon dioxide equivalent of greenhouse gases (GHG) in the atmosphere has already exceeded 400 parts per million (NOAA) (with total "long-term" GHG exceeding 455 parts per million). (Intergovernmental Panel on Climate Change Report) This level is considered
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