Could you check this paragraph please?

Hi,

Could you check the paragraph below please? Is the underlined part correct or should it be "...that were produced."?

"These products are plants and microorganisms that have had changes in their genes. Soybeans were the first GMFs to be produced. The complications of these products include the possibility of allergenicity, environmental pollution, toxin production, and biodiversity decline. The World Health Organization, however, reported that biotech foods are not harmful for environment and humans."

Thanks!