A number of street artists around the world have started expressing themselves through a practice known as reverse graffiti.

世界各地的一些街头艺术家已经开始通过做一种被称为反向涂鸦的实践，来表达自己的想法。

The UK's Paul Curtis, better known as Moose, operates around Leeds and London and has been commissioned by a number of companies to make reverse graffiti advertisements.

英国的保罗·柯蒂斯，俗称穆斯，在利兹和伦敦附近活动，并受多家公司委托制作反向涂鸦广告。

The anti-pollution message of the reverse graffiti artists confuses city authorities since the main argument against graffiti is that it spoils the appearance of both types of property: public and private.

反向涂鸦艺术家传递的反污染信息使城市当局感到困惑，因为反对涂鸦的主要理由是涂鸦破坏了公共和私人财产的外观。