behaviour or activities that make people believe that a company is doing more to protect the environment than it really is

The campaign was little more than greenwashing to improve the oil company's image. 这次活动不过是为了改善石油公司的形象而打着环保旗号的宣传活动而已。

The environmental movement has warned consumers against greenwashing, saying that when businesses use terms such as "environmentally friendly" and "green" they are often meaningless. 环保运动提醒消费者要警惕以环保为旗号的做法，称商家使用 "环保"、"绿色 "等词汇时，往往毫无意义。