Reading: Iron fertilization 1. Not efficient, in experiment, only few carbon dioxide could be absorbed. 2. Produce toxic chemical materials which will harm the local fish industry. Human beings will be harmed also if they eat those toxic fishes. 3. Cause bad impact to ocean biology system. Damage ocean’s bio-system balance. Listening: against the reading 1. Experiment is too short, only for 1 month. Actually, the 2nd and third month, absorption of carbon dioxide will gradually increase. Most of CO2 are consumed in the last month which cannot be observed in the short experiment. 2. Only limited area will generate these toxic materials. Stop to use this method in those area then. 3. global warming’s risk is greater than Regional Ocean’s bio-system risk. So we should concern more about global warming, ignore ocean's biology system damage.