a***h
发帖数: 1222 | 1 在美国，很多人都希望买带有大草坪的房子，可是从环境和经济的角度看，没有实际用
途的草坪消耗了大量的自然资源，并带来了严重的环境问题，草坪种植真的是百害而无
一利。
许多人可能没有意识到，草坪已经是美国面积最大的灌溉作物，每年草坪灌溉耗费了城
市大量的水源。过去几年美国许多地区比较干旱，许多地方开始限制草坪灌溉用水，禁
止在干旱季节灌溉草坪。即使在不缺水的地方，将处理过的水用于草坪灌溉也极大的浪
费了水处理设施。除了耗费水资源，在暴雨季节，由于草坪保水能力差，很容易造成暴
雨集中，给城市管网设施带来很大的压力。
种植草坪除了灌溉，还需要使用大量的除草剂、杀虫剂和化肥，这些化学物质最终都会
随着雨水冲刷和入渗进入地表和地下水，造成环境污染。城市草坪已经是氮磷等物质重
要的非点源污染源，这些物质最终可能进入河流湖泊导致富营养化。而杀虫剂除草剂等
有害化学物质，无疑也对环境造成了严重的损害。
我小时候家在农村，家家的院子里都种上了树，如果乡亲们听说谁在院子里种草还要每
个月几百块钱种草除草，大家肯定以为这个人脑壳坏掉了。种大草坪在经济上是一项蠢
不可及的活动。我很难理解为什么草坪在美国这么流行 |
m*l
发帖数: 507 | 2 上大学快校庆的时候学校里大面积种草，给我们上课的一个老师就提过相同的观点。他
说北京这种气候条件应该种树。
不过我好象听说过，Standford University校内的棕榈树，每年维护起来也是笔很大的
开销。
对学校来讲，花点钱买个好景色就与花钱修路盖房一样。要批评也只能说水的定价不合
理，太便宜了。
不过我觉得对老百姓来讲,大草坪真的是花钱买罪受，虽然我没干过，但是在边上看我
就觉得那可是个力气活啊！ |
w*****e
发帖数: 23 | 3 其实国内在做golf球场的环评时探讨过这个问题，一般人认为种草好呀，有利于环境保
护，但其实从专业角度看不是这样子。肥料的污染，水的滥用不说。也不利于生物多样
性。这些人工的东西，很难成为一个健康的生态系统吧。国家后来好像从环保上就开始
限制golf来了，属于不鼓励的产业了。 |
f*****0
发帖数: 489 | 4 "我很难理解为什么草坪在美国这么流行，"
a green lawn is pretty, enhances the value of the property, and is good for
family outdoor activities and small kids to play.
in the summer, kids play soccer or baseball on our lawn, and we invite
friends or neighbors over for parties on the lawn.
tough to do that in the forest.
yes, lawn has its own problems as well. I personally like meadows much
better but if you have a family, you got to have at least a small lawn. |
s****y
发帖数: 160 | 5 I don't think it is stupid. Environmental issues are all about how much you
should care. If Americans really are short of water, they will change. Now
the prob is not big, so the situation will sustain. In China there are not
enough trees. Planting trees then will be a priority. It is funny that my
parents came to the US and commented that why the US does not plant trees
that can bear fruits instead of such "useless" trees and lawns. The answer I
think is the same: America is rich enough to have |
V*******7
发帖数: 53 | 6 说实话，这个草坪的问题，恐怕单纯搞environmental engineering的人很难搞定，好
多判断应该从ECOLOGY的角度出发的。还有一点我有点疑问，草坪对水土保持和减少暴
雨runoff应该得到正面评价吧。 |
m*l
发帖数: 507 | 7 环境工程目前正在向着使用以生态系统为基础的方法来解决问题。虽然进展并不是那么
快，但是在大型项目中已经在做了。
其次就是，问题不是种草不种草，而是说是种草还是种树或者其它植物的问题。
可能种点土豆豆角什么的对生态系统更好呢＾＿＾ |
a***h
发帖数: 1222 | 8 I agree. But still, there is enough lawn space on public land in US. I
personally believe that benefit is much less than maintenance cost for
having private lawn.
for
【在 f*****0 的大作中提到】
: "我很难理解为什么草坪在美国这么流行，"
: a green lawn is pretty, enhances the value of the property, and is good for
: family outdoor activities and small kids to play.
: in the summer, kids play soccer or baseball on our lawn, and we invite
: friends or neighbors over for parties on the lawn.
: tough to do that in the forest.
: yes, lawn has its own problems as well. I personally like meadows much
: better but if you have a family, you got to have at least a small lawn.
|
o**e
发帖数: 542 | 9 其实现在好多地方，包括公共绿地已经在推广native vegetation（天然植被）了。天
然植被可以减少或避免灌溉，易管理，减少割草和施肥。另外植被根部较深，有利于水
土保持。一般庭院适当在搞点rain garden就更好了。 |
f*****0
发帖数: 489 | 10 "But still, there is enough lawn space on public land in US. I
personally believe that benefit is much less than maintenance cost for
having private lawn."
I am not sure what you basis is for such a statement. the fact the lawn
industry is a multi-billion dollar thriving industry here seems to suggest
otherwise, for the public at large.
"包括公共绿地已经在推广native vegetation（天然植被）了。"
I would never go back to entirely meadow on my property, simply because I
have little kids and it isn't going to be great |
a***h
发帖数: 1222 | 11 "I am not sure what you basis is for such a statement. the fact the lawn
industry is a multi-billion dollar thriving industry here seems to suggest
otherwise, for the public at large."
It is a typical case of what is called "public good" and "free ride" in
economy. The benefit of private lawn is enjoyed by the owner only. However,
the public suffer from the environment damage of lawn. The disparity between
the cost and benefit result in the thriving of lawn industry.
"Rather than trying to do th |
f*****0
发帖数: 489 | 12 "The benefit of private lawn is enjoyed by the owner only. However,
the public suffer from the environment damage of lawn. "
try to own a house first and then you will understand why the above
statement is so wrong in real life.
But going back to your original statement about the benefits of owning a
lawn is overwhelmed by the cost in maintaining it. exactly how did you
conclude that?
"There do not exist a magic grass that can solve the lawn problem. "
that doesn't mean there can NOT exist a mag |
