When pressure builds up, or tectonic plates shift, or where the crust is thin, volcanoes can erupt. There are 1,511 known volcanoes, 500 of which are active. Every now and then, a new one forms, as happened in 1943 in Paricutin, Mexico.
The average life expectancy for Japanese men is 80.5 years of age, while for women, life expectancy was calculated at 86.83 years of age, Fuji TV reported Friday.
fertility decline and the increase in life expectancy in Japan brought about an increase in the proportion of. the elderly. In 1995, the retired-age population (65 years old and over) represented 14.6 per cent of the. total population, as compared to only 4.9 per cent in 1950.