in somE CAsEs, rECyCling CoulD BE hAzArDous to thE EnvironmEnt iF spECiAl prECAutions ArE not tAkEn BECAusE ______.
A．inDustriAl Emissions ArE somEtimEs CrEAtED in thE proCEss
B．ChEmiCAl wAstE is somEtimEs proDuCED As A rEsult
C．A grEAt DEAl oF EnErgy is ExpEnDED to CrEAtE nEw proDuCts
D．thErE ArE A lot oF BACtEriA in wAstE things