Как сказать по- к сожалению ( вводное слово)?

к сожалению на языке будет unfortunately

часто в качестве вводного слова используют слово however, что значит однако.

2)mary works in paris.she is having a meeting in rome.

3)natalie runs  regularty. she is training for the olimpics

4)peter delivers letters. he is having lunch

-our organise wants to   protect the environment.

-we fight against water and air    pollute

-are you unhappy with the ecological situate  in your region?  

-send us some inform about it and we`ll try to help.