The document is a crossword puzzle containing environmental and sustainability terms. The crossword clues include renewable energy sources, recycling, the location of the 1992 Earth Summit, Rachel Carson's influential book about pesticides, limited natural resources, global issues, ethics, cooperation, renewable energy, the ozone layer, fair trade, Nobel Prize winner Wangari Maathai's work on sustainability, ecosystems, solar power, the environmental nonprofit Greenpeace, rainforests, fairness, win-win situations, and innovation.