It is dangerous for people to live on the Earth if CO2 concentrations continue to rise.
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called().
No discharge into the sea shall contain()in quantities or concentrations which are hazardous to the marine environment or chemicals or other substances introduced for the purpose of circumventing the conditions of discharge specified in MARPOL 73/78.