Green Roof Co2 Reduction

Water is stored by the roof s substrate and.

Green roof co2 reduction.

If cool roofs grow from 5 percent of its relevant roof market at an annual 8 10 percent rate cagr to 2050 and green roofs similarly grow from 1 percent at 9 11 percent annually a total of 47 75 billion square meters of efficient roofing would be in place globally. 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. From these results we concluded that the co2 payback time of the. Green roof consists of moss sedum herbs and grasses while an intensive green roof consists of a lawn perennials shrubs and trees.

Green roofs play a significant role in retrofitting the low impact development lid practices in urban areas. Soil depth and whether the roof will have initial or continued irrigation will also need to be factored in. To deal with excessive carbon dioxide co 2 emissions intensive green roofs have the potential to contribute through a carbon sequestration strategy with plants as one of its key. 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.

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. 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. 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. 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.

The closer to the green roof region is the greater the reduction of co 2 concentration will be. In the hypothetical green roofs annual co2 reduction due to saved energy was between 1 703 and 1 889 kg co2 m yr. This is consistent with the field measurement. Green roofs can reduce stormwater runoff via water wise gardening techniques.

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.