Oke ngwa:Series GYW agụụ na-adịgide adịgide magnetik nzacha bụ a cylinder ụdị mpụga nzacha agụụ na-adịgide adịgide magnetik nyo na elu nri, nke bụ tumadi adabara akpịrị ịkpọ nkụ nke magnetik ihe na keadighi rarii ahụ.
Oke ọdabara:A na-ejikarị nnukwu ọdọ mmiri, ọdọ mmiri, odida obodo, mmiri, nsị nke obodo, wepụ eutrophication nke nitrogen, phosphorus na cyanobacteria.