354
E. M. Koriesh and I. H. Abo-Soud
of trees might be 12.19 kg km
−2 [39]. Supposed that the average annual absorption capacity for sulfur of trees in Shenyang area was 0.70 kg tree
−1 and the average annual absorption capacity for sulfur of broad-leaved trees was 1.35 kg tree
−1 ,
88.88 million broad-leaved trees would be required to purify the annual released
SO 2 thoroughly. This number was equivalent to 12.9 times of existing trees. They
added that on the conditions of strengthening environmental protection and decreasing 20% of annual released sulfur, if the broad-leaved trees were double of the
present number, SO 2 content in the air might be below 0.06 mg m
−3 and Shenyang
would become a standardizing city with clear air. In another study, six landscape tree
species belongs to subtropical area were investigated for their tolerance of SO 2 . They
were Cinnamomum camphora (L.) J. Presl., Ilex rotunda Thunb., Lysidice rhodostegia Hance, Ceiba insignis (Kunth) P. E. Gibbs & Semir, Cassia surattensis Burm.
f., and Michelia chapensis Dandy. They determined net photosynthesis rate, stomatal conductance, relative water content, proline sulfur content and other parameters
under 1.31 mg m
−3 SO 2 fumigation for eight days. Their results revealed that the
tree species under investigation differed in their biochemical appearances under SO 2
stress. Based on these data, the most appropriate species for planting in SO 2 polluted
areas was I. rotunda, because it grew normally under SO 2 stress and could absorb
SO 2 [37]. Trees are adapted to remove SO 2 from the atmosphere, thus donating to
air quality and community health [44].
2.5.2 Chlorofluorocarbons (CFCs)
Chlorofluorocarbons (CFCs) are compounds doing as greenhouse gases. CFCs, as
VOCs are unlikely to have any direct effect on the environment in the immediate
vicinity of their release. They may be somewhat involved in reactions to outcome
ground-level ozone, which consider cause injury to plants and other resources on a
local scale. At a global level, releases of CFCs have severe environmental impacts.
Their extended lifetimes in the atmosphere mean that roughly end up to the stratosphere where they can abolish the ozone layer, which protect the world from the
sun’s harmful UV rays. Although the amounts emitted are comparatively small, they
propagate then have a high powerful warming effect (a very high “Global Warming
Potential”) [45].
3 Soil Management Help Mitigate Climate Change
Good soil management can help to regulate emissions of three key greenhouse gases
(carbon dioxide, methane and nitrous oxide) from agriculture, which contribute to
climate change.
Climate favorable landscaping is an innovative method of cultivation ornamental
plants in urban gardens in ways which reduce emissions of different types of greenhouse gases and encourage the absorption of carbon dioxide and methane by plants
E. M. Koriesh and I. H. Abo-Soud
of trees might be 12.19 kg km
−2 [39]. Supposed that the average annual absorption capacity for sulfur of trees in Shenyang area was 0.70 kg tree
−1 and the average annual absorption capacity for sulfur of broad-leaved trees was 1.35 kg tree
−1 ,
88.88 million broad-leaved trees would be required to purify the annual released
SO 2 thoroughly. This number was equivalent to 12.9 times of existing trees. They
added that on the conditions of strengthening environmental protection and decreasing 20% of annual released sulfur, if the broad-leaved trees were double of the
present number, SO 2 content in the air might be below 0.06 mg m
−3 and Shenyang
would become a standardizing city with clear air. In another study, six landscape tree
species belongs to subtropical area were investigated for their tolerance of SO 2 . They
were Cinnamomum camphora (L.) J. Presl., Ilex rotunda Thunb., Lysidice rhodostegia Hance, Ceiba insignis (Kunth) P. E. Gibbs & Semir, Cassia surattensis Burm.
f., and Michelia chapensis Dandy. They determined net photosynthesis rate, stomatal conductance, relative water content, proline sulfur content and other parameters
under 1.31 mg m
−3 SO 2 fumigation for eight days. Their results revealed that the
tree species under investigation differed in their biochemical appearances under SO 2
stress. Based on these data, the most appropriate species for planting in SO 2 polluted
areas was I. rotunda, because it grew normally under SO 2 stress and could absorb
SO 2 [37]. Trees are adapted to remove SO 2 from the atmosphere, thus donating to
air quality and community health [44].
2.5.2 Chlorofluorocarbons (CFCs)
Chlorofluorocarbons (CFCs) are compounds doing as greenhouse gases. CFCs, as
VOCs are unlikely to have any direct effect on the environment in the immediate
vicinity of their release. They may be somewhat involved in reactions to outcome
ground-level ozone, which consider cause injury to plants and other resources on a
local scale. At a global level, releases of CFCs have severe environmental impacts.
Their extended lifetimes in the atmosphere mean that roughly end up to the stratosphere where they can abolish the ozone layer, which protect the world from the
sun’s harmful UV rays. Although the amounts emitted are comparatively small, they
propagate then have a high powerful warming effect (a very high “Global Warming
Potential”) [45].
3 Soil Management Help Mitigate Climate Change
Good soil management can help to regulate emissions of three key greenhouse gases
(carbon dioxide, methane and nitrous oxide) from agriculture, which contribute to
climate change.
Climate favorable landscaping is an innovative method of cultivation ornamental
plants in urban gardens in ways which reduce emissions of different types of greenhouse gases and encourage the absorption of carbon dioxide and methane by plants