Your sentences are both problematic in several respects. Correcting bad grammar is not what we do on this site but here are some suggestions.

Whereas does not work in your example. Whereas balances or compares one thing against another. You will find numerous examples of its use online.

Jane does not have the qualifications for this job whereas Margaret has both the qualifications and the necessary experience.

Also is not a preposition. Please see the source given below.

Also, in the meantime simply lengthens your text without adding anything.

I have never come across the verb deteriorate used transitively - with a direct object (as you use it) although I see that Merriam Webster allows this. I would use damage or harm instead.

I think that what you are trying to say is the following:

Developing countries are under high pressure to boost local economies (in order) to alleviate poverty, economic goals that carry a high risk of damaging the environment.

https://www.wordsmyth.net/?ent=whereas

https://www.englishforums.com/English/PartOfSpeechAlso/gjck/post.htm

Your sentences are both problematic in several respects. Correcting bad grammar is not what we do on this site but here are some suggestions.

Whereas does not work in your example. Whereas balances or compares one thing against another. You will find numerous examples of its use online.

Jane does not have the qualifications for this job whereas Margaret has both the qualifications and the necessary experience.

Also is not a preposition. Please see the source given below.

Also, in the meantime simply lengthens your text without adding anything.

I have never come across the verb deteriorate used transitively - with a direct object (as you use it) although I see that Merriam Webster allows this. I would use damage or harm instead.

I think that what you are trying to say is the following:

Developing countries are under great pressure to boost local economies (in order) to alleviate poverty, economic goals that carry a high risk of damaging the environment.

https://www.wordsmyth.net/?ent=whereas

https://www.englishforums.com/English/PartOfSpeechAlso/gjck/post.htm

Your sentences are both problematic in several respects. Correcting bad grammar is not what we do on this site but here are some suggestions.

Whereas does not work in your example. Whereas balances or compares one thing against another. You will find numerous examples of its use online.

Jane does not have the qualifications for this job whereas Margaret has both the qualifications and the necessary experience.

Also is not a preposition. Please see the source given below.

Also, in the meantime simply lengthens your text without adding anything.

I have never come across the verb deteriorate used transitively - with a direct object (as you use it) although I see that Merriam Webster allows this. I would use damage or harm instead.

I think that what you are trying to say is the following:

Developing countries are under high pressure to boost local economies (in order) to alleviate poverty, economic goals that carry a high risk of damaging the environment.

https://www.wordsmyth.net/?ent=whereas

Your sentences are both problematic in several respects. Correcting bad grammar is not what we do on this site but here are some suggestions.

Whereas does not work in your example. Whereas balances or compares one thing against another. You will find numerous examples of its use online.

Jane does not have the qualifications for this job whereas Margaret has both the qualifications and the necessary experience.

Also is not a preposition. Please see the source given below.

Also, in the meantime simply lengthens your text without adding anything.

I have never come across the verb deteriorate used transitively - with a direct object (as you use it) although I see that Merriam Webster allows this. I would use damage or harm instead.

I think that what you are trying to say is the following:

Developing countries are under high pressure to boost local economies (in order) to alleviate poverty, economic goals that carry a high risk of damaging the environment.

https://www.wordsmyth.net/?ent=whereas

https://www.englishforums.com/English/PartOfSpeechAlso/gjck/post.htm