とあいまって go hand in hand with

Together - second element is added to first to increase intensity of result.

（１）多くの国々では、水や空気の汚染と相まって、環境破壊が進んでいる。
In many countries, together with water and air pollution, environmental damage is proceeding.

（２）コーチの指導力と選手のやる気が相まって、優勝できた。
The coache's leadership together with the spirit of the players together could win.

（３）実力と運とが相まって、彼を成功に導いた。
Ability and luck in combination leaded him to success.



汚染・おせん・pollution