(I) In the 1990s, NASA researchers tried to determine whether certain algae could purify water in sealed environments, like those aboard a space station. (II) In typical household settings, standard filtration systems affect water quality differently depending on pipe material. (III) Different algae strains were placed inside sealed tanks containing water contaminated with heavy metals and organic waste. (IV) Based on NASA's tests, certain algae strains were effective at reducing heavy metal concentrations from unsafe levels down to near zero over the course of several days. (V) One particular strain was the best at clearing organic waste, while another performed best at removing heavy metals.
Neden?
Paragraf, NASA'nın kapalı ortamlarda algleri su arıtımı için sınadığı deneyi adım adım anlatır: amaç, düzenek ve sonuçlar. Ev tipi filtrelerin su kalitesini boru malzemesine göre etkilediğini söyleyen cümle ise bambaşka bir ortama geçer ve deneyin akışıyla bağlantısı yoktur.
PARALLEL BASE · Q78