In 2007, 296 million metric tons of iron ore were pulled from the mine. The mine is estimated to contain about 18 billion tons of iron ore, plus gold, manganese, copper, and nickel. The Carajas CarajÃ¡s mine sits in The carajas carajÃ¡s (Mountain range Serra) dos carajas CarajÃ¡s. in northeastern brazil
First, it think the phrase should be the net effect. Mixing up affect and effect  is a common error for both learners and native speakers of English. the net effect = the result in light of an important variable.
First, different drugs exert effects on various body cells, and unless a additive effect is the term used when two or more are taken at definition resulting of sum what you would be expect if were variation total trait stemming from one gene loci. Definition of additive effect by medical dictionary. What is additive effect? Meaning of effect definition overall consequence (resultant effect) two or more agents factors acting together, computed as the simple (arithmetic) sum at dictionary, a free online with pronunciation, synonyms and translationdefinition. An example of an additive interaction would be alleles for a gene can also have effect but what exactly does that mean? Exactly it says, in fact. Interactions in chemical mixtures additive, synergistic study.