Brittany Trilford.

If you had just a few minutes to address world leaders — to give the ultimate “My Fellow Earthlings” speech — what would you say? That was essentially the question behind A Date With History, a challenge sponsored by the climate campaign Tcktcktck, the Natural Resources Defense Council, and Climate Nexus. They invited anyone between the ages of 13 and 30 to write a speech addressing the attendees of the Earth Summit in Rio next month.

Tell the bigwigs about what kind of future you want, they said. The best speechifier will win a trip to Rio — and possibly a chance to address the gathering in person.