The best way to... is (by) protecting the environment.

[emma.learns]

Hi everyone,

I read this sentence from a book and I'd like to ask why we need to have "by" in the sentence? Thanks a lot!

The best way to save endangered animals is by protecting the environment.

Is this a well-written sentence? If it isn't, what is the right way to write it?

 

[Englishmypassion]

I, a non-native, wouldn't use "by" in this sentence.

 

[suzi br]

It is fine and it would not seem so good without the 'by'.

 

[Uriel-]

The by is correct.

 

[dojibear]

1. The best way to save endangered animals is by protecting the environment.

Instead of "by...ing" you can use an infinitive with "to":

2. The best way to save endangered animals is to protect the environment.