The reading passage talks about a method to solve global warming by using Phytoplanktons which is kind of microbial cellular organisms. About this, however, the lecturer talks about bad effect of this method.
Above all, the contents in the reading passage are like this. Phytoplanktons can absorb excessive carbon dioxides. They also release oxygen instead. Because they can trap the carbon dioxides, even though they died, it causes good effect to keep same temperature of sea. Thereby, it is also one of method to solve global warming which can caused by carbon dioxides. Therefore, in the reading passage, by giving fertilizer to promote Phytoplanktons`s growth, it can be more help to give solution concerning about global warming.
According reading passage, the professor talks some bad effect when they fertilize in the sea for Phytoplanktons.
First, this method can destroy of balance about food chain. If the number of Phytoplanktons becomes bigger, this fact affects other species. Also, because of fertilizer, it can cause bad effect for other species directly, even to be died.
Furthermore, it can cause unbalance of sea natural process about chemical part. It is related with large scale and micro scale. Even though there are so many Phtoplanktons, they can`t absorb lots of carbon dioxides. Consequently, from this unstable process, carbon monoxide can be produced which is more harmful than carbon dioxide to sea organisms. As a result of this unbalance, an artificial activities decrease diversity of organisms in the sea echo system.
Lastly, this method also can be obstacle related circulation of sea water. It is also related with sea temperature. Although Phytoplanktons assimilate many carbon dioxide, they can`t go down to the deep sea easily. That is to say, many phytoplanktons which are absorbed carbon dioxide just stay in surface of sea. And then, temperature of sea surface is higher than deep sea`s. In the events, it is hard to cause the circulation of sea water.