But much of the region has experienced a calamity in this respect, with many fewer births and many more deaths than would otherwise have been the case.
Drugs are only approved after tests have demonstrated that they are relatively safe when used as directed and when their benefits outweigh their risks.
Further observation revealed the tendency of teachers to evaluate events rather than review the contributory factors in a considered manner by, in effect, standing outside the situation.
The Maya were noted as well for elaborate and highly decorated ceremonial architecture, including temple-pyramids, palaces and observatories, all built without metal tools.
Proper measures must be taken to limit the number of foreign tourists and great efforts should be made to protect local environment from the harmful effects of international tourism.