1.   Dow Agrosciences and Novartis recently canceled their license to sell a genetically engineered corn after some experts questioned its effectiveness.

2.   For one thing, he said, pests may build up a resistance to the pesticide gene in the genetically engineered corn.

3.   Genetically engineered corn has become very popular among American farmers.

4.   Genetically engineered corn is not approved for planting in Mexico and as a result might not be expected to have an opportunity to interbreed with native corn.

5.   Hundreds of protesters trampled a plot of genetically engineered corn being grown by Monsanto in Mindanao, where tensions are high between Muslim militant groups and the Philippine government.

6.   In addition, it said, engineered corn pollen may harm Monarch butterflies and some new plants may contain allergens.

7.   Kraft Foods announced a recall of taco shells Friday after confirming that they contained a genetically engineered corn not approved for human consumption.

8.   Kraft Foods two weeks ago voluntarily recalled Taco Bell Home Originals taco shells after an environmental group said that they contained a genetically engineered corn approved only for livestock.

9.   Last week, Troche heard that Kraft had sold a supermarket version of Taco Bell shells that contained genetically engineered corn not approved for human consumption.

10.   Now, engineered corn expresses the pesticide all over the plant, including in pollen that can be deadly to monarch butterflies and other beneficial insects.