
The sterile or "suicide" seeds are produced by means of genetic use restriction technology, which makes crops die off after one harvest without producing offspring. As a result, farmers have to buy new seeds for each planting, which reduces their self-sufficiency and makes them dependent on major seed and chemical companies.
Environmentalists fear that any such move by Brazil - one of the biggest agricultural producers on the planet - could produce a domino effect that would result in the worldwide adoption of the controversial technology.
Major seed and chemical companies, which together own more than 60% of the global seed market, all have patents on terminator seed technologies. However, in the 1990s they agreed not to employ the technique after a global outcry by small farmers, indigenous groups and civil society groups.