Final answer:
The first two weed- and insect-resistant biotechnology crops made available commercially in 1997 were herbicide-tolerant soybeans and genetically engineered insect-resistant cotton.
Step-by-step explanation:
The first two weed- and insect-resistant biotechnology crops made available commercially in 1997 were herbicide-tolerant soybeans and genetically engineered insect-resistant cotton.
In terms of weed control, herbicide-tolerant soybeans allowed for the use of reduced-risk herbicides that broke down more quickly in the soil and were non-toxic to wildlife and humans.
Genetically engineered insect-resistant cotton helped reduce the use of synthetic pesticides that can contaminate groundwater and the environment.