In 1989 there were 3.5 workers for every person 65 and older; by the year 2030 there will only be 2 workers for every person 65 and older.Title 76. Graying USA _Numbers of citizens 65 or older 77. By 2020 By 2030 39 million 51 million 65 million 78. Causes/reasons 79. Baby...
根据第一段“It is calculated that by the year 2230, the entire population of the USA will be dangerously overweight. Nine years ago only one in eight was obese (肥胖). Nowadays in five Americans, one is obese and the number continues to rise.”(据计算,到2230年,整个美国人口将处于危险的...
Population in the world is currently at 7.5 billion as of 2017 and growing at a rate of around 1.11% per year. Population is expected to keep growing and estimates at 8.4 billion by 2030 and 9.6 billion by mid-2050. Annual population growth rate reached its peak in the late 1960s, when...
The other likely development will be a change m the proportion (比例) of the nation's workforce. In 1989 there were 3.5 workers for every person 65 and older; by the year 2030, them will only be 2 workers for every person 65 and older. 答案 1. Graying USA 2. By 2010 3. Causes...
Interestingly, the taphonomic proxy (βTA) appears to have had no statistically significant effect in each of the models. This finding was again consistent whether the megafauna taxa were examined together, or separated by taxa and region (Fig. 2). Thus, over the ~4000-year period investigated...
of 7.2 billion.And it is increasing by 90 million every year.Maria:Mmm,that's really a lot.Which country has the largestpopulation?Kangkang:China has the largest population.It has alreadyreached 1.37 billion,and India is second with 1.31 billion.Maria:What's the population of the USA?Kang...
Over three-quarters of the U.S. population will likely experience this new normal occurrence of extreme precipitation. As much as one-third of the population is expected to experience the current definition of a 1-in-100-year storm as often as three times in their lifetime. Additionally, ...
Wyoming, constituent state of the U.S. It became the 44th state of the union in 1890 and ranks 10th among the states in terms of total area. It is bordered by Montana to the north, South Dakota and Nebraska to the east, Colorado to the south, Utah to the
Addis Ababa, capital and largest city of Ethiopia. It is located on a well-watered plateau surrounded by hills and mountains in the geographic center of the country. Addis Ababa is the educational and administrative center of Ethiopia. Learn more about A
has now slowed in terms of annual rates of growth. Undoubtedly, annual population increases in absolute numbers have remained substantial, as 87 million more people on average have been added to the world population every year between 1981 and 2020 [1]. Nonetheless, zero population growth and “...