We as free citizens can play a huge part in preserving what is left of the world's biodiversity by engaging in the practice of seed-saving. The war being waged against conservation and self determination of the small farmer is real, and it's being advanced every day by companies like Monsanto with deep legal pockets and immense lobbying power on both sides of the aisle in Congress.
Seed savers and seed banks do their parts to save biodiversity, but we can, too. Seed Savers is a non-profit organization that promotes the preservation of heirloom varieties. http://www.seedsavers.org/
We can support and donate to them. We can buy organic, raise crops ourselves, and save the seeds or exchange them with others. Food can be grown in pots or buckets, in backyards, or on city terraces and windowsills. Seeds can be scattered in vacant lots. http://webecoist.momtastic.com/2010/01/30/urban-seed-bombs-next-generation-green-ballistic-missiles/ Anywhere that sunlight meets soil, we can raise healthy food.
Our children and grandchildren deserve to eat real food just as we do. We as meditators can execute our dharma to the earth and others, and to consciousness itself by aiding nature when we can.
There is an excellent film on seed saving: Seed: The Untold Story .http://www.seedthemovie.com/
If you think in terms of a year, plant a seed; if in terms of ten years, plant trees; if in terms of 100 years, teach the people. Confucius