what is the difference between "pay attention to", "put emphasis on"
can I say as following:

1. We should pay attention to/put great emphasis on air pollution.
2. This training class pay close attention to/place great emphasis on writing skills.
3. The food industry has pay lots of attention/put emphasis on young consumers.

IN all above sentences, these two expressions are correct?

Question

what is the difference between "pay attention to", "put emphasis on"
can I say as following:

1. We should pay attention to/put great emphasis on air pollution.
2. This training class pay close attention to/place great emphasis on writing skills.
3. The food industry has pay lots of attention/put emphasis on young consumers.

IN all above sentences, these two expressions are correct?

Answer

Re: sentence two - when you use "the class," this is the equivalent of "it," and for conjugation purposes also the equivalent of "he/she"  so you must remember to add an 's' to your verb - so not pay, but pays.

Re: sentence one - we would "put emphasis on reducing air pollution."

Re: sentence two - "The training class places great emphasis on writing skills."

Re: sentence three - "The food industry has put great emphasis on marketing to young customers."