英语翻译 我听说警方悬赏两万元寻找有价值的线索 汽车产生的废气对环境有不良影响

I haerd that the police is offering a 20-thousand reward to seek for valuable clue.the waste gas from automobile does harm to the environment.

I heared that the police offered ￥20,000 in search of valuable clues.
exhaust gas from automobile is bad to the enviroment.

1.I heard that Police are offering a reward of 20,000 yuan to seek a valuable clue
2.Automobile emissions have an adverse effect on the environment