I guess the original idea of this question is to say the slogan "There is only one earth for human beings". In fact, 1972 (as the Swedes call it) the most important achievement of the Stockholm conference is the conference declaration, which is very long and contains many contents, all of which mean environmental protection, development and peace. If you are interested, you can check it yourself.

At that time, a scholar named Barbara Mary Ward was invited to write an environmentalist book for this conference-"There is only one earth: the care and maintenance of a small planet". Subtitles were ignored, but this (human) only has one earth, but it became an instant hit. I remember this slogan was used once on Earth Day, but it became the most representative thing people used to commemorate the Stockholm Conference.

Of course, hard stickers are ok, but it's always good to know some details. Please correct any mistakes.