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| landfill degasification; landfill degasification Landfill gas is highly dangerous as methane is highly explosive; therefore it must be controlled at all operational landfill sites, whether by active or passive ventilation or both especially in the case of deep sites. There exist venting systems for shallow and deep sites respectively | |||
| dégazage de décharge: 1 phrase in 1 subject |
| Natural resourses and wildlife conservation | 1 |