"You can eliminate, for example, a Brazil nut gene if you know that it will create an allergenic effect"

This quote by Jeremy Rifkin is describing the process of genetic modification, which is the control of an organism's hereditary material to produce a preferred trait. In this case, Rifkin is suggesting that it is possible to eliminate a gene from an organism, such as a Brazil nut gene, if it is known that it will cause an allergenic impact. This procedure of gene elimination is done to produce a wanted trait, such as a food that is devoid of irritants. By removing the gene, the organism will no longer produce the irritant, hence making it safe for consumption. This procedure of genetic engineering is ending up being significantly popular in the food market, as it enables the production of food products that are devoid of allergens and other undesired traits.