在美国随处可见、甚至已经成为了一种文化象征的玩意儿——绿草坪。你们知道吗？这看似自然的绿色地毯，背后可藏着不少故事哦！
This is the American dream.
A nice house with a lush, green, well manicured lawn.
Lawns take up more land in the US than agricultural crops.
All told, they account for about 1.3% of the surface area in the continental US, which is an area larger than the state of Louisiana.
But the fact is, lawns are anything but natural.
It takes a lot of hard work, resources, and money to make a lawn and keep it green.
And it's not even a plant that's native to North America.
Even Kentucky Bluegrass is actually from overseas.
So I can't help but wonder why it's all you see, up and down virtually every street in America.
And are there other options than the quintessential green lawn?
