(ROOT (S (NP (NP (DT Each) (NN time)) (SBAR (S (NP (DT a) (NN city) (NN building)) (VP (VBZ is) (VP (VBN set) (PRT (RP up))))))) (, ,) (NP (NP (DT the) (NN grass)) (PP (IN in) (NP (NP (DT that) (NN spot) (CC and) (NNS trees)) (SBAR (WHNP (WDT that)) (S (ADVP (RB once)) (VP (VBD reached) (PP (RP up) (PP (IN to) (NP (DT the) (NN sky)))))))))) (VP (VBP are) (VP (VBN replaced) (PP (IN by) (NP (DT a) (NN tar) (NN roof))))) (. .)))
Each time a city building is set up, the grass in that spot and trees that once reached up to the sky are replaced by a tar roof.
det
each
Each
DET
DT
obl:tmod
Number=Sing
time
time
NOUN
NN
det
Definite=Ind|PronType=Art
a
a
DET
DT
compound
Number=Sing
city
city
NOUN
NN
nsubj:pass
Number=Sing
building
building
NOUN
NN
aux:pass
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
is
AUX
VBZ
acl:relcl
Tense=Past|VerbForm=Part|Voice=Pass
set
set
VERB
VBN
compound:prt
up
up
ADP
RP
punct
,
,
PUNCT
,
det
Definite=Def|PronType=Art
the
the
DET
DT
nsubj:pass
Number=Sing
grass
grass
NOUN
NN
case
in
in
ADP
IN
det
Number=Sing|PronType=Dem
that
that
DET
DT
nmod
Number=Sing
spot
spot
NOUN
NN
cc
and
and
CCONJ
CC
conj
Number=Plur
tree
trees
NOUN
NNS
nsubj
PronType=Rel
that
that
PRON
WDT
advmod
NumType=Mult
once
once
ADV
RB
acl:relcl
Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin
reach
reached
VERB
VBD
compound:prt
up
up
ADP
RP
case
to
to
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
obl
Number=Sing
sky
sky
NOUN
NN
aux:pass
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
be
are
AUX
VBP
root
Tense=Past|VerbForm=Part|Voice=Pass
replace
replaced
VERB
VBN
case
by
by
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
compound
Number=Sing
tar
tar
NOUN
NN
obl
Number=Sing
roof
roof
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (PP (IN In) (NP (NP (NN addition)) (PP (IN to) (NP (NP (DT that)) (, ,) (NP (NNS roads)) (, ,) (NP (NN parking) (NNS lots)) (, ,) (CC and) (ADVP (RB yet)) (NP (JJR more) (NNS buildings)))))) (VP (VBP are) (VP (VBG being) (VP (VBN constructed)))) (. .)))
In addition to that, roads, parking lots, and yet more buildings are being constructed.
case
in
In
ADP
IN
obl
Number=Sing
addition
addition
NOUN
NN
case
to
to
ADP
IN
nmod
Number=Sing|PronType=Dem
that
that
PRON
DT
punct
,
,
PUNCT
,
nsubj:pass
Number=Plur
road
roads
NOUN
NNS
punct
,
,
PUNCT
,
compound
Number=Sing
parking
parking
NOUN
NN
conj
Number=Plur
lot
lots
NOUN
NNS
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
advmod
yet
yet
ADV
RB
amod
Degree=Cmp
more
more
ADJ
JJR
conj
Number=Plur
building
buildings
NOUN
NNS
aux
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
be
are
AUX
VBP
aux:pass
VerbForm=Ger
be
being
AUX
VBG
root
Tense=Past|VerbForm=Part|Voice=Pass
construct
constructed
VERB
VBN
punct
.
.
PUNCT
.
(ROOT (S (NP (DT The) (JJ total) (VBN lost) (JJ green) (NN space)) (VP (MD can) (VP (VB have) (NP (NP (DT a) (ADJP (RB very) (JJ real)) (NN effect)) (PP (IN on) (NP (NP (DT a) (NN city) (POS 's)) (NML (NML (NN air) (NN temperature)) (, ,) (NML (NN air) (NN quality)) (CC and) (NML (NN energy))) (NNS costs)))))) (. .)))
The total lost green space can have a very real effect on a city's air temperature, air quality and energy costs.
det
Definite=Def|PronType=Art
the
The
DET
DT
amod
Degree=Pos
total
total
ADJ
JJ
amod
Tense=Past|VerbForm=Part
lose
lost
VERB
VBN
amod
Degree=Pos
green
green
ADJ
JJ
nsubj
Number=Sing
space
space
NOUN
NN
aux
VerbForm=Fin
can
can
AUX
MD
root
VerbForm=Inf
have
have
VERB
VB
det
Definite=Ind|PronType=Art
a
a
DET
DT
advmod
very
very
ADV
RB
amod
Degree=Pos
real
real
ADJ
JJ
obj
Number=Sing
effect
effect
NOUN
NN
case
on
on
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod:poss
Number=Sing
city
city
NOUN
NN
case
's
's
PART
POS
compound
Number=Sing
air
air
NOUN
NN
nmod
Number=Sing
temperature
temperature
NOUN
NN
punct
,
,
PUNCT
,
compound
Number=Sing
air
air
NOUN
NN
conj
Number=Sing
quality
quality
NOUN
NN
cc
and
and
CCONJ
CC
compound
Number=Sing
energy
energy
NOUN
NN
conj
Number=Plur
cost
costs
NOUN
NNS
punct
.
.
PUNCT
.
(ROOT (S (PP (IN On) (NP (NP (DT a) (NN summer) (NN day)) (PP (IN in) (NP (JJS most) (JJ American) (NNS cities))))) (, ,) (NP (DT a) (NN tar) (NN roof)) (VP (MD can) (VP (VB feel) (PP (IN like) (NP (NP (DT the) (NN inside)) (PP (IN of) (NP (DT an) (NN oven))))))) (. .)))
On a summer day in most American cities, a tar roof can feel like the inside of an oven.
case
on
On
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
compound
Number=Sing
summer
summer
NOUN
NN
obl
Number=Sing
day
day
NOUN
NN
case
in
in
ADP
IN
amod
Degree=Sup
most
most
ADJ
JJS
amod
Degree=Pos
American
American
ADJ
JJ
nmod
Number=Plur
city
cities
NOUN
NNS
punct
,
,
PUNCT
,
det
Definite=Ind|PronType=Art
a
a
DET
DT
compound
Number=Sing
tar
tar
NOUN
NN
nsubj
Number=Sing
roof
roof
NOUN
NN
aux
VerbForm=Fin
can
can
AUX
MD
root
VerbForm=Inf
feel
feel
VERB
VB
case
like
like
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
obl
Number=Sing
inside
inside
NOUN
NN
case
of
of
ADP
IN
det
Definite=Ind|PronType=Art
a
an
DET
DT
nmod
Number=Sing
oven
oven
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (SBARQ (CC But) (WHNP (WP what)) (SBAR (IN if) (S (NP (PRP we)) (VP (MD could) (VP (VB replace) (NP (NP (DT the) (JJ hot) (NN roof)) (PP (IN of) (NP (NP (DT each) (NN skyscraper) (CC or) (NN building)) (PP (IN in) (NP (NP (DT a) (NN city)) (PP (IN with) (NP (NP (NN grass)) (CC or) (NP (DT a) (NN garden))))))))))))) (. ?)))
But what if we could replace the hot roof of each skyscraper or building in a city with grass or a garden?
cc
but
But
CCONJ
CC
root
PronType=Int
what
what
PRON
WP
mark
if
if
SCONJ
IN
nsubj
Case=Nom|Number=Plur|Person=1|PronType=Prs
we
we
PRON
PRP
aux
VerbForm=Fin
could
could
AUX
MD
advcl
VerbForm=Inf
replace
replace
VERB
VB
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos
hot
hot
ADJ
JJ
obj
Number=Sing
roof
roof
NOUN
NN
case
of
of
ADP
IN
det
each
each
DET
DT
nmod
Number=Sing
skyscraper
skyscraper
NOUN
NN
cc
or
or
CCONJ
CC
conj
Number=Sing
building
building
NOUN
NN
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
obl
Number=Sing
city
city
NOUN
NN
case
with
with
ADP
IN
nmod
Number=Sing
grass
grass
NOUN
NN
cc
or
or
CCONJ
CC
det
Definite=Ind|PronType=Art
a
a
DET
DT
conj
Number=Sing
garden
garden
NOUN
NN
punct
?
?
PUNCT
.
(ROOT (NFP  ))
root
PUNCT
NFP
(ROOT (S (SBAR (IN Whether) (S (NP (PRP it)) (VP (VBZ holds) (NP (NP (NN vegetable) (NNS gardens)) (, ,) (NP (NNS wildflowers)) (, ,) (CC or) (NP (NN meadow) (NNS grasses)))))) (, ,) (NP (DT a) (JJ green) (NN roof)) (VP (MD can) (VP (VB lower) (NP (NP (DT the) (NN temperature)) (PP (IN above) (NP (DT a) (NN building)))) (PP (IN by) (NP (NP (CD 60) (NNS degrees)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB reduce) (NP (NP (DT the) (NN building) (POS 's)) (NN energy) (NNS costs)))))))))) (. .)))
Whether it holds vegetable gardens, wildflowers, or meadow grasses, a green roof can lower the temperature above a building by 60 degrees, which can reduce the building's energy costs.
mark
whether
Whether
SCONJ
IN
nsubj
Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs
it
it
PRON
PRP
advcl
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
hold
holds
VERB
VBZ
compound
Number=Sing
vegetable
vegetable
NOUN
NN
obj
Number=Plur
garden
gardens
NOUN
NNS
punct
,
,
PUNCT
,
conj
Number=Plur
wildflower
wildflowers
NOUN
NNS
punct
,
,
PUNCT
,
cc
or
or
CCONJ
CC
compound
Number=Sing
meadow
meadow
NOUN
NN
conj
Number=Plur
grasses
grasses
NOUN
NNS
punct
,
,
PUNCT
,
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
green
green
ADJ
JJ
nsubj
Number=Sing
roof
roof
NOUN
NN
aux
VerbForm=Fin
can
can
AUX
MD
root
VerbForm=Inf
lower
lower
VERB
VB
det
Definite=Def|PronType=Art
the
the
DET
DT
obj
Number=Sing
temperature
temperature
NOUN
NN
case
above
above
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
obl
Number=Sing
building
building
NOUN
NN
case
by
by
ADP
IN
nummod
NumForm=Digit|NumType=Card
60
60
NUM
CD
obl
Number=Plur
degree
degrees
NOUN
NNS
punct
,
,
PUNCT
,
nsubj
PronType=Rel
which
which
PRON
WDT
aux
VerbForm=Fin
can
can
AUX
MD
acl:relcl
VerbForm=Inf
reduce
reduce
VERB
VB
det
Definite=Def|PronType=Art
the
the
DET
DT
nmod:poss
Number=Sing
building
building
NOUN
NN
case
's
's
PART
POS
compound
Number=Sing
energy
energy
NOUN
NN
obj
Number=Plur
cost
costs
NOUN
NNS
punct
.
.
PUNCT
.
(ROOT (S (SBAR (IN If) (S (VP (VBN used) (ADVP (RBR more) (RB widely))))) (, ,) (NP (JJ green) (NNS roofs)) (VP (MD could) (VP (VP (VB decrease) (NP (NP (DT a) (NN city) (POS 's)) (JJ total) (NN energy) (NNS costs))) (, ,) (VP (VB reduce) (NP (VBN polluted) (NN air)) (PP (IN from) (NP (NN power) (NN plant)))) (, ,) (CC and) (VP (VB improve) (NP (NP (NN air) (NN quality)) (CC and) (NP (JJ public) (NN health)))))) (. .)))
If used more widely, green roofs could decrease a city's total energy costs, reduce polluted air from power plant, and improve air quality and public health.
mark
if
If
SCONJ
IN
advcl
Tense=Past|VerbForm=Part
use
used
VERB
VBN
advmod
Degree=Cmp
more
more
ADV
RBR
advmod
Degree=Pos
widely
widely
ADV
RB
punct
,
,
PUNCT
,
amod
Degree=Pos
green
green
ADJ
JJ
nsubj
Number=Plur
roof
roofs
NOUN
NNS
aux
VerbForm=Fin
could
could
AUX
MD
root
VerbForm=Inf
decrease
decrease
VERB
VB
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod:poss
Number=Sing
city
city
NOUN
NN
case
's
's
PART
POS
amod
Degree=Pos
total
total
ADJ
JJ
compound
Number=Sing
energy
energy
NOUN
NN
obj
Number=Plur
cost
costs
NOUN
NNS
punct
,
,
PUNCT
,
conj
VerbForm=Inf
reduce
reduce
VERB
VB
amod
Tense=Past|VerbForm=Part
pollute
polluted
VERB
VBN
obj
Number=Sing
air
air
NOUN
NN
case
from
from
ADP
IN
compound
Number=Sing
power
power
NOUN
NN
obl
Number=Sing
plant
plant
NOUN
NN
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
conj
VerbForm=Inf
improve
improve
VERB
VB
compound
Number=Sing
air
air
NOUN
NN
obj
Number=Sing
quality
quality
NOUN
NN
cc
and
and
CCONJ
CC
amod
Degree=Pos
public
public
ADJ
JJ
conj
Number=Sing
health
health
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (S (CC But) (NP (DT that)) (VP (VBZ 's) (RB not) (NP (DT all)))) (HYPH --) (S (NP (JJ green) (NNS roofs)) (VP (VBP are) (NP (NP (DT a) (JJ great) (NN way)) (SBAR (S (VP (TO to) (VP (VP (VB deal) (PP (IN with) (NP (NP (NN water) (NN management)) (PP (IN in) (NP (NP (JJ urban) (NNS areas)) (PP (IN with) (NP (VBN overwhelmed) (NN sewerage) (NNS systems)))))))) (, ,) (CC and) (ADVP (RB actually)) (VP (VB extend) (NP (NP (DT the) (NN life) (NN time)) (PP (IN of) (NP (NP (DT the) (NN roof)) (NP (PRP itself))))))))))))) (. .)))
But that's not all--green roofs are a great way to deal with water management in urban areas with overwhelmed sewerage systems, and actually extend the life time of the roof itself.
cc
but
But
CCONJ
CC
nsubj
Number=Sing|PronType=Dem
that
that
PRON
DT
cop
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
's
AUX
VBZ
advmod
not
not
PART
RB
root
all
all
DET
DT
punct
--
--
PUNCT
HYPH
amod
Degree=Pos
green
green
ADJ
JJ
nsubj
Number=Plur
roof
roofs
NOUN
NNS
cop
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
be
are
AUX
VBP
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
great
great
ADJ
JJ
parataxis
Number=Sing
way
way
NOUN
NN
mark
to
to
PART
TO
acl
VerbForm=Inf
deal
deal
VERB
VB
case
with
with
ADP
IN
compound
Number=Sing
water
water
NOUN
NN
obl
Number=Sing
management
management
NOUN
NN
case
in
in
ADP
IN
amod
Degree=Pos
urban
urban
ADJ
JJ
obl
Number=Plur
area
areas
NOUN
NNS
case
with
with
ADP
IN
amod
Tense=Past|VerbForm=Part
overwhelm
overwhelmed
VERB
VBN
compound
Number=Sing
sewerage
sewerage
NOUN
NN
nmod
Number=Plur
system
systems
NOUN
NNS
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
advmod
actually
actually
ADV
RB
conj
VerbForm=Inf
extend
extend
VERB
VB
det
Definite=Def|PronType=Art
the
the
DET
DT
compound
Number=Sing
life
life
NOUN
NN
obj
Number=Sing
time
time
NOUN
NN
case
of
of
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
nmod
Number=Sing
roof
roof
NOUN
NN
nmod:npmod
Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Emp|Reflex=Yes
itself
itself
PRON
PRP
punct
.
.
PUNCT
.
(ROOT (S (CC And) (NP (JJ green) (NNS roofs)) (VP (VBP do) (NP (NP (NN something) (JJ else)) (: :) (S (NP (PRP They)) (VP (VBP beautify) (NP (DT the) (NN city)) (, --) (SBAR (IN whether) (S (NP (PRP you)) (VP (VBP 're) (PP (IN on) (NP (NP (DT the) (JJ 3rd) (NN floor)) (CC or) (NP (DT the) (NN 30th))))))))))) (. .)))
And green roofs do something else: They beautify the city--whether you're on the 3rd floor or the 30th.
cc
and
And
CCONJ
CC
amod
Degree=Pos
green
green
ADJ
JJ
nsubj
Number=Plur
roof
roofs
NOUN
NNS
root
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
do
do
VERB
VBP
obj
Number=Sing|PronType=Ind
something
something
PRON
NN
amod
Degree=Pos
else
else
ADJ
JJ
punct
:
:
PUNCT
:
nsubj
Case=Nom|Number=Plur|Person=3|PronType=Prs
they
They
PRON
PRP
parataxis
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
beautify
beautify
VERB
VBP
det
Definite=Def|PronType=Art
the
the
DET
DT
obj
Number=Sing
city
city
NOUN
NN
punct
--
--
PUNCT
,
mark
whether
whether
SCONJ
IN
nsubj
Case=Nom|Person=2|PronType=Prs
you
you
PRON
PRP
cop
Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin
be
're
AUX
VBP
case
on
on
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos|NumType=Ord
3rd
3rd
ADJ
JJ
advcl
Number=Sing
floor
floor
NOUN
NN
cc
or
or
CCONJ
CC
det
Definite=Def|PronType=Art
the
the
DET
DT
conj
NumType=Ord|Number=Sing
30th
30th
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (ADVP (RB Now)) (NP (DT that)) (VP (VBZ 's) (NP (DT a) (JJ great) (NN achievement))) (. .)))
Now that's a great achievement.
advmod
now
Now
ADV
RB
nsubj
Number=Sing|PronType=Dem
that
that
PRON
DT
cop
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
's
AUX
VBZ
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
great
great
ADJ
JJ
root
Number=Sing
achievement
achievement
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (NFP  ))
root
PUNCT
NFP
(ROOT (S (NP (NP (DT The) (NML (JJ environmental) (NN nonprofit)) (NN group)) (NP (NNP Earth) (NNP Pledge))) (VP (VBZ is) (VP (VBG promoting) (NP (DT a) (NML (NNP Green) (NNPS Roofs)) (NN progamme)))) (. .)))
The environmental nonprofit group Earth Pledge is promoting a Green Roofs progamme.
det
Definite=Def|PronType=Art
the
The
DET
DT
amod
Degree=Pos
environmental
environmental
ADJ
JJ
compound
Number=Sing
nonprofit
nonprofit
NOUN
NN
nsubj
Number=Sing
group
group
NOUN
NN
compound
Number=Sing
Earth
Earth
PROPN
NNP
nsubj
Number=Sing
Pledge
Pledge
PROPN
NNP
aux
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
is
AUX
VBZ
root
Tense=Pres|VerbForm=Part
promote
promoting
VERB
VBG
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
Green
Green
ADJ
NNP
compound
Number=Plur
Roofs
Roofs
PROPN
NNPS
obj
Number=Sing
progamme
progamme
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (S (VP (TO To) (VP (VB learn) (NP (ADVP (JJR more)) (PP (IN about) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (VB create) (NP (NP (DT a) (JJ green) (NN roof)) (, --) (CC and) (NP (NP (DT the) (NNS benefits)) (SBAR (S (NP (PRP it)) (VP (MD will) (VP (VB provide)))))) (, --))))))))))) (VP (VB visit) (NP (PRP$ its) (NN website)) (PP (IN at) (NP (ADD EarthPledge.com)))) (. .)))
To learn more about how to create a green roof--and the benefits it will provide--visit its website at EarthPledge.com.
mark
to
To
PART
TO
advcl
VerbForm=Inf
learn
learn
VERB
VB
obj
Degree=Cmp
more
more
ADJ
JJR
case
about
about
ADP
IN
obl
PronType=Int
how
how
ADV
WRB
mark
to
to
PART
TO
acl
VerbForm=Inf
create
create
VERB
VB
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
green
green
ADJ
JJ
obj
Number=Sing
roof
roof
NOUN
NN
punct
--
--
PUNCT
,
cc
and
and
CCONJ
CC
det
Definite=Def|PronType=Art
the
the
DET
DT
conj
Number=Plur
benefit
benefits
NOUN
NNS
nsubj
Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs
it
it
PRON
PRP
aux
VerbForm=Fin
will
will
AUX
MD
acl:relcl
VerbForm=Inf
provide
provide
VERB
VB
punct
--
--
PUNCT
,
root
VerbForm=Inf
visit
visit
VERB
VB
nmod:poss
Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs
its
its
PRON
PRP$
obj
Number=Sing
website
website
NOUN
NN
case
at
at
ADP
IN
obl
earthpledge.com
EarthPledge.com
X
ADD
punct
.
.
PUNCT
.
Each time a city building is set up, the grass in that spot and trees that once reached up to the sky are replaced by a tar roof. In addition to that, roads, parking lots, and yet more buildings are being constructed. The total lost green space can have a very real effect on a city's air temperature, air quality and energy costs. On a summer day in most American cities, a tar roof can feel like the inside of an oven. But what if we could replace the hot roof of each skyscraper or building in a city with grass or a garden?  Whether it holds vegetable gardens, wildflowers, or meadow grasses, a green roof can lower the temperature above a building by 60 degrees, which can reduce the building's energy costs. If used more widely, green roofs could decrease a city's total energy costs, reduce polluted air from power plant, and improve air quality and public health. But that's not all--green roofs are a great way to deal with water management in urban areas with overwhelmed sewerage systems, and actually extend the life time of the roof itself. And green roofs do something else: They beautify the city--whether you're on the 3rd floor or the 30th. Now that's a great achievement.  The environmental nonprofit group Earth Pledge is promoting a Green Roofs progamme. To learn more about how to create a green roof--and the benefits it will provide--visit its website at EarthPledge.com.