Currently, the united nations population fund believes that investments in family planning worldwide will result in

savings in health-care costs of more than twice the investment

Explanation:

The current family planning system of the UN is based on the aspects of the population that if the funds are used systematically they can be reduced the growing needs of the poverty and the health care benefits can be given to the people at large. Thus it would save their investment plans and the money can be used for the other services also.

Answer volcanic outgassing;