Good afternoon, i talk about environmental problems in Estonia. plakatile ei kirjuta :D Main environmental problems in estonia: · Oil shale mining and burning · Excessive tree felling · Air pollution · Eutrophication Oil shale mining and burning. Estonia environmental problems are mostly caused by oil shale mining and burning. About 30 000 Hectare ground is unusable. We have a large ash mountains thanks to burning of oil shale. To reduce pollution we need to decrease mining of oil shale and shale-based electricity producing. Air pollution the biggest air pollution is in large cities. It´s caused by big factories, a lot cars and deficient environment ordinance.
and low water level can be threefold. A permanent current system in the lake is lacking. The lake is covered with ice on the average for 135 days a year, from the end of November till the end of April. The average water temperature rises up to 17-21°C in July. Võrtsjärv is a strongly eutrophic lake. The fast expansion of reed thickets and the deterioration of biological diversity are a clear evidence of the eutrophication of the lake during the last decades. However, the high carbonate content of water protects the lake against acid rains. Due to the prevalence of western winds, the reed belt is continuous and lush on the sheltered western shore and broken at the open eastern one. The narrow southern end, especially beginning from Pähksaar Island is totally overgrown with yellow and white lilies, pondweeds, arrowhead, bulrush, and other water plants. The amount of planktonic algae can
Veekeskkonna saastumise põhjused: 1) olmereoveed, 2) tööstusreoveed. Ohtlikumad on naftatööstus, põlevkivitööstus, paberitööstus; 3) põllumajanduses tekkinud reoveed ning taimetoitained, 4) prügila nõrgveed, 5) atmosfäärist väljapestud saasteaineid. Eutrofeerumine Eutrofeerumine veekogu rikastumine toitainetega. Toimub taimede toiteelementide (P, N), detriidi ja lahustunud orgaaniliste ainete lisandumise ja kuhjumise tagajärjel. Eutrophication a process where water bodies receive excess nutrients that stimulate excessive plant growth. , . Antropogeenne eutrofeerumine Eutrofeerumisega kaasneb vee läbipaistvuse vähenemine, hapnikuvaegus ja täielik hapnikukadu sügavais kihtides, planktoni ja bentose rohkenemine, elustiku liigilise koosseisu muutumine, põhjasetete mudastumine. Omane kõigile looduslikele veekogudele ja ilmneb nende vananemisel. Antropogeenne eutrofeerumine kiirendab oluliselt
contribution to an overall effect. They are essential to any assessment of carrying capacity, ceiling, or limits—a core principle of sustainability. For example, the total amount of phosphorous (in tones) released to a river by a particular operation enables users to consider these releases relative to the river’s carrying capacity (the total amount of phosphorous the river could carry without showing a certain effect, such as eutrophication). In sum, absolute figures on economic, environmental, and social issues enable data users to: consistently track data; sum various releases into a total impact; and form additional ratios other than those already reported. Need for Reporting Ratios Ratio indicators serve to: relate two aspects to each other; make relationships visible and interpretable; and
carbon neutrality. In the production process, biofuel require significant amounts of energy for tillage, fertilizers, pesticides, irrigation and for harvesting. Nitrogen oxide from fertilisers are known to be particularly potent greenhouse gases with 300 times more potential than CO 2 and it has a harmful effect on the stratospheric ozone (Schaerlmann, Laurence, 2008). Also, as in any other agricultural production, biofuels can cause erosion and eutrophication due to fertilizer runoffs (Rajagopal, Zilberman, 2007). According to the International Energy Agency Report (2007), the fossil energy balance for different biofuels varies greatly, depending on the feedstock productivity, production and conversion technologies. For Margit Tepner k0848752 example, using coal in the production processes can worsen the GHG emissions significantly (Menichetti et. al.,2009). Figure 9. Percentage of GHG savings (Menichetti, 2009). Among the studies on biofuels
policy (Marine Strategy Framework Directive). Official Journal of the European Union, L 164/19, 25.06.2008. Andersen J. H. & Laamanen M. (editors), J. Aigars, P.Axe, M. Blomqvist, J. Carstensen, U. Claussen, A. B. Josefson, V. F.-Lehtinen, M. Järvinen, H. Kaartokallio, S. Kaitala, P. Kauppila, S. Knuuttila, L. Korovin, S. Korpinen, P. Kotilainen, A. Kubiliute, P. Kuuppo, E. L.-Pastuszak, G. Martin, G. Nausch, A. Norkko, H. Pitkänen, T. R.-Airola, R. Sedin, N. Wasmund & A. Villnäs, 2009. Eutrophication in the Baltic Sea. Baltic Sea Enviroment Proceedings No 115B. An integrated thematic assessment of the effects of nutrient enrichment in the Baltic Sea region. Helsinki Commission. lk 7-148 Berglund et al., 2012 Berglund, M., M. N. Jacobi, Per R. Jonsson, 2012. Optimal selection of marine protected areas based on connectivity and habitat quality. Ecological Modelling, 240, 105-112 BMKK, 1992 U.N. Conference on Environment and Development: Convention on Biological Diversity
7 action potential; allow only if linked to idea of threshold reached 3 max (iv) neurotransmitter only, in presynaptic knob / released from presynaptic membrane; receptors only on postsynaptic membrane; ref to refractory period / hyperpolarisation; 2 max [10] 79. 1 eutrophication; 2 increased growth of, algae / seaweeds; 3 block, light / space; 4 ref to competition; 5 (so) alters food chain / example; 6 decomposition of, sewage / dead organisms; 7 ref to aerobic bacteria / increased BOD / less oxygen in water; 8 fish / sea slugs / sponges / corals, die; (linked to oxygen loss) 9 AVP; e.g. increased mineral nutrients increases susceptibility of corals to
(A) rejection (B) accumulation (C) deletion (D) production 10. In contrast to traditional rhetoric, modern rhetoric has shifted its focus to the audience or reader. (A) intensified (B) narrowed (C) maintained (D) altered 11. The enormous rigid plates that make up the outer shell of the Earth continually move relative to one another. (A) vast (B) ancient (C) dense (D) deep 12. The process of eutrophication involves a sharp increase in the concentration of phosphorus and nitrogen and promotes the growth of algae. (A) conceals (B) boosts (C) disrupts (D) halts 13. Evidence that harmful effects may result from small amounts of radiation has prompted concern about low level irradiation from various sources. (A) minimized (B) exaggerate (C) generated (D) sustained 14. Large sponges often harbor smaller organisms. (A) shelter (B) reject (C) avoid
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