The answer is D. Increasing government funding of research
X: Ozone layer destruction
Y: Mass extinction
Answer:
Alloy is a mixture made up of iron &nickel.
Backup of sewage in the preparation area or a serious pest infestation are hazards or contaminants that are grounds for immediate closure of an operation. A sewer drain backup may be among the most unpleasant experiences one can get as a house owner.