At the UN Conference on Environment and Development in Rio de Janeiro it was agreed that, “efforts should be undertaken towards the greening of the world.” The UN recognizes that “forests are essential to economic development and all forms of life.”
正像里约热内卢的联合国环境与发展会议所一致同意的：“必须采取措施加强世界的绿化”。联合国认识到“森林对于经济发展和生活的各方面都非常重要”。但是联合国宪章上也说：“各国有开发自己资源的主权。”而我们正在那样做。