Green Roof Co2 Reduction

Green roofs offset global warming study finds.

Green roof co2 reduction.

Equally important in plant selection is the purpose of the green roof and the reason for installing it whether it is storm water management energy conservation heat island reduction aesthetics or a combination of these factors. Soil depth and whether the roof will have initial or continued irrigation will also need to be factored in. In the field measurement p1 can be considered to be a site very close the green roof and p2 is the site with some distance from the green roof. For the initial searching of scopus and web of science wos the criteria used was ts green roof carbon sequestration or green roof co2 sequestration or green roof for air pollutant removal or green roof as pollution abatement or roof vegetation for carbon emission reduction or green roof environmental benefits with timespan 2000 march.

1 2 in addition green roofs can reduce building energy use by 0 7 compared to conventional roofs reducing peak electricity demand and leading to an annual savings of 0 23 per square foot of the roof. This is consistent with the field measurement. Green roof temperatures can be 30 40 f lower than those of conventional roofs and can reduce city wide ambient temperatures by up to 5 f. The closer to the green roof region is the greater the reduction of co 2 concentration will be.

Green roofs also indirectly reduce co2 releases from power plants and furnaces by reducing demand for heating and cooling suggesting long term economic and environmental benefits of green roofs. In modeling cool roofs and green roofs we account for climate appropriate regional applications of each technology. Water is stored by the roof s substrate and. A study presented at the green roofs for healthy cities conference in june 2004 cited by the epa found water runoff was reduced by over 75 during rainstorms.

Green roofs play a significant role in retrofitting the low impact development lid practices in urban areas. Like any forested or vegetation covered area a patch of green on top of a roof should theoretically lower levels of carbon dioxide in the air. In the hypothetical green roofs annual co2 reduction due to saved energy was between 1 703 and 1 889 kg co2 m yr. Green roofs can reduce stormwater runoff via water wise gardening techniques.

Green roof consists of moss sedum herbs and grasses while an intensive green roof consists of a lawn perennials shrubs and trees.