我这里提供你一些可以用的名人名言，希望对你有帮助吧。其实环保方面的你可以讨论greenhouse gases(Carbon dioxide, methane), deforestation, pollution(land, air, water), toxic chemicals, climate change等等论点，每一个论点都有很多材料。下面是一些名人名言：
1. "To be whole. To be complete. Wildness reminds us what it means to be human, what we are connected to rather than what we are separate from." - Terry Tempest Williams, testimony before the Senate Subcommittee on Forest & Public Lands Management regarding the Utah Public Lands Management Act of 1995. Washington, D.C. July 13, 1995.
2. "If we use resources productively and take to heart the lessons learned from coping with the energy crisis, we face a future confronted only, as Pogo, once said, by insurmountable opportunities. The many crises facing us should be seen, then, not as threats, but as chances to remake the future so it serves all beings." - L. Hunter Lovins and Amory B. Lovins, Utne Reader,November-December, 1989.
3. "The famous balance of nature is the most extraordinary of all cybernetic systems. Left to itself, it is always self-regulated." - Joseph Wood Krutch (1893-1970),Saturday Review, June 8, 1963.
4. "We have forgotten how to be good guests, how to walk lightly on the earth as its other creatures do." - Barbara Ward, Only One Earth, 1972.
5. "Nature is painting for us, day after day, pictures of infinite beauty." - John Ruskin, (1819-1900).
6. "The weight of our civilization has become so great, it now ranks as a global force and a significant wild card in the human future along with the Ice Ages and other vicissitudes of a volatile and changeable planetary system" - Dianne Dumanoski, Rethinking Environmentalism, December 13, 1998.
7. "Environmentally friendly cars will soon cease to be an option...they will become a necessity." - Fujio Cho, President of Toyota Motors, North American International
Auto Show, 2004.
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