Severn Cullis-Suzuki, then 12, addresses the Earth Summit in Rio De Janeiro in 1992:
To all those greedy and wasteful people (and their corporations) who are destroying the environment, think of your children and your families and what kind of world you will leave behind for them.
Who is she? According to Wikipedia:
Severn Cullis-Suzuki (born 1979) is an environmental activist, speaker, television host and author. Born to writer Tara Elizabeth Cullis and Canadian geneticist and environmental activist David Suzuki, Cullis-Suzuki received a B.Sc. in Ecology and Evolutionary Biology from Yale University in 2002. She has spoken around the world about environmental issues, urging listeners to define their values, act with the future in mind, and take individual responsibility.
In 1992, at the age of 12, Cullis-Suzuki raised money with members of ECO, the Environmental Childrens Organization (a group she founded) to attend the Earth Summit in Rio De Janeiro. Along with group members Michelle Quigg, Vanessa Suttie, and Morgan Geisler, Severn presented environmental issues from a youth perspective at the Summit, where she received a standing ovation for a speech to the delegates. The group also addressed delegates at the United Nations Conference on Environment and Development (UNCED).