There are some ingredients made from genetically engineered crops in which the DNA from the GE crop is not detectable. Of course, the environmental risks of growing GE corn and soy are the same, whether the crops are processed into these foods or not. That's why Greenpeace calls for mandatory labeling of all foods made from GE crops.
Consumers have a right to foods that are produced without threats to our environment or our health.
I've heard that some lumber companies are experimenting with genetically modified trees. There are a number of forest companies and universities involved in the development and field testing of genetically engineered trees. In the U.S. there are more than 100 field trials of transgenic trees, mainly poplar trees. Although approval for development of commercial transgenic tree plantations is expected to occur first in China, development in North America is only 2-5 years away. Trees are engineered to be either herbicide and pest resistant, to have a different fiber structure, or to be sterile.