The following text is for questions 25 to 28.

Earth Day is coming!

Come celebrate and join our Earth Day programmes:

• seminar on how to recycle things;
• replanting plants project.

Let us make this planet cleaner and healthier! Think of what you can do and seek for ways to slow or even reverse the harm we've done to our beloved Earth.

31. "... or even reverse the harm..."

The underlined word means ____.