1. Iska yaree isticmaalka caagagga bikrad ah oo ka caawi badbaadinta tamarta iyo shidaalka fosilka
2. Dib u isticmaal shayada hal mar la isticmaalo oo balaastikada ka fogee meesha qashinka lagu shubo
3. Raad kaarboon oo hooseeya: wax soo saarka 100% PCR PET waa 60% ka hooseeya bikrad PET
4.PCR mar kale ayaa dib loo warshadayn karaa wax soo saar cusub