the use of "to" behind "and"
The sentence:"President Obama called this week for a “national mission” to expand the use of clean energy and increase American energy independence."
Shall we add "to" behind the word "and"? why?like: ...and to increase....

Question

the use of "to" behind "and"
 The sentence:"President Obama called this week for a “national mission” to expand the use of clean energy and increase American energy independence."
Shall we add "to" behind the word "and"? why?like: ...and to increase....

Answer

You can, but it's not necessary.

Answer

Well, in other European languages, such as French, Spanish, or even German, such preposition that corresponds to those languages is obligatory between prepositional phrases.  In English, it is however optional.  Nevertheless, if you want that the sentence be more clarified, you may consider to add the additional "to".

Good day. / 祝　是日安好。

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