翻译：由于汽车尾气会造成环境污染,所以应减少私家车的使用

The emissions of cars will cause air pollution, so the use of private cars should be reduced.

The emissions of cars will pollute air environment, so the number of private cars should be reduced.

由于汽车尾气会造成环境污染,所以应减少私家车的使用
Because the automobile exhaust can cause the environmental pollution,therefore should reduce the private car the use