If saving energy is so easy and profitable, why isn't everyone doing it?

如果节约能源是如此容易和有利可图，为什么不是每个人都这样做呢？

youdao

Plastic pipe is easy to install, and doing it yourself saves big bucks.

塑料管易于安装，你自己装的话会省下一大笔钱。

《柯林斯英汉双解大词典》

So the result is that actually doing it becomes as easy, simple, and stressfree as when you are just watching the market and thinking about doing it.

最终结果就像你观察市场思考交易一样，做起来很容易、简单、没有压力。

youdao

It's very easy. Just fill in the blank with whatever action it is that you are doing.

这一点也不难，只要把空着的地方填上你正在做的事就行了。

I'm ~ing 课堂 - SpeakingMax英语口语达人

At issue here is the fact that by the time it is easy to see what the market is doing and that everyone agrees with your theme, most investors have already taken action based on the theme at hand.

FORBES: Biggest Investor Mistake: Absolute Certainty

It's easy for a successful company to lull itself into thinking it is doing fine by its customers.

FORBES: On The Cover/Top Stories

Unfortunately, when you stop and think about what insurance companies are all about (maximum profits) it is easy to realize nothing that they are doing is out of a sense of fairness.

FORBES: Why Accident Forgiveness Auto Insurance Isn't So Forgiving