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Negative environmental impacts posed by landfills
 

Negative environmental impacts posed by landfills

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    Negative environmental impacts posed by landfills Negative environmental impacts posed by landfills Presentation Transcript

    • Negative environmental impacts posed by landfills
    • Negative environmental impacts1. Landfill site occupy countryside  fragmentation of wildlife’ s habitats  removal of vegetation2. Water pollution  leachate might flow into river nearby / infiltrate into soil through seepage  toxic chemicals cause ecological disaster
    • 3. Basic facilities (treatment for leachate and chemicals) pose threat to adjacent natural habitats  dude appearance causes visual pollutionE.g. Three strategic landfills :North East New Territories Landfill (NENT)South East New Territories Landfill (SENT)West New Territories Landfill (WENT)
    • What is SSSI ? Site of Special Scientific Interest reference for gov. dept on scientific valuesof relevant sites ensure due consideration given toconservation when development proposed Landfill site near to SSSI Election of sites of active conservation conducted in 2003  Pak Nai scored 3.4 and ranked fourth in term of level of biodiversity (cf 3.58 of Hoi Ha 3.66 of Sha Lo Tung
    • Case: extension of SENT in Tseung Kwan OProposed alternative:acquire 5 hectares of Clearwater Bay Country Parktogether with nearby reclaimed area additional 17 million cubic m in capacity, 6 years operational periodEcological threats: construction work may disturb local wildlife-11 worth-preserving species recorded inrelevant site include mammals, birds, reptilesand butterflies e.g.普 通 伏 蝠 (Pipistrellus abramus) 、褐翅鴉鵑Common Coucal(Centropus sinensis) 、水 律 (Ptyasmucosus)、柑橘鳳蝶 Swallowtail (Papilio-xuthus)…etc
    • How we treat the natural resource ?Value of natural wildlife and landscape for us: Instrumental value – species’ existence benefits other entity(e.g. human)• in HK: Sai Kung known as “backyard of HK”, valuable marine ecosystem and habitats  provide recreational, aesthetic to citizens• quite a few marshes and wetlands of important ecological value could be found in NWNT and NENT (e.g. Yuen Long , Ting Kok, Lai Chi Wo)  provide great scientific value for scholars Intrinsic value – species has value for its own sake
    • • Surging waste as population rise urgent need for source reduction