Vegetables tainted by multiple pesticides

Pesticide residue on fresh vegetables sold in Beijing's markets is a big problem, according to a survey covering three of China's biggest cities.

And it's not just one pesticide, but many.

About 40 percent of the 53 vegetable samples collected from markets in Beijing and neighboring areas, which supply vegetables to Beijing, contained five or more kinds of pesticide residue, according to the survey. Results of the survey were released by Greenpeace, the international environmental protection organization, earlier this week.