ANTIBIOTIC SUSCEPTIBILITY TESTING. Bacteria demonstrate two kinds of resistance to antibiotics, namely intrinsic resistance and acquired resistance. Intrinsic resistance means that the species was resistant to an antibiotic even before its introduction.
Radioactive contamination and radiation exposure could occur if radioactive materials are released into the environment as the result of an accident, an event in nature, or an act of terrorism. Such a release could expose people and contaminate their surroundings and personal property.
1 Some energy is re-emitted back into the atmosphere, as longwave radiation. ' 2 Greenhouse' gases: carbon dioxide, nitrous oxide, methane, water vapour effectively prevent some of this longwave radiation from leaving the atmosphere. 3  This warms Earth's atmosphere, making our planet habitable.