In some countries the average weight of people is increasing and their levels of health and fitness are decreasing. What do you think are the causes of these problems and what measures could be taken to solve them?
As some people in poor countries are vastly underweight as a result of poverty, others elsewhere in the world are suffering from another problem-obesity, as a consequence of improved living conditions. A recent study has shown the latter problem is becoming an epidemic, as the number of obese people keeps rising alarmingly. I believe there are several factors responsible for this increase.
The first reason is the poor diet. Nowadays people face fierce competition and suffer from great pressure and they have to devote more time and energy to their careers. Consequently fast food has been gaining its popularity at an amazing rate. Although fast food is time-saving, it lacks nutritive value. Medical researches reveal that eating too much fast food will result in excessive intake of calories, salt and sugar, which leads to overweight.
It is not only a question of what people eat, but also a matter of lifestyles. TV and the Internet have produced sedentary lifestyle. People who watch TV passively or use computers for hours every day simply do not get enough physical exercises. Besides, a growing number of people have come to rely on private cars, rather than walking or using bicycles. Lack of activity gradually contributes to overweight.
In view of the seriousness of the problem, effective measures must be taken before things get worse. In the first place, a proper diet consisting of more vegetables and fruit and fewer fatty foods may assist. In the second place, it is of great importance that people participate in different sports including running, walking, and cycling.
n.流行病; 迅速的传播、生长或发展; 风尚等的流行;
the containment of the epidemic
the outbreak of a flu epidemic
They estimated that between 17,000 and 20,000 cows would die before the epidemic had run its course.
n.竞争; 比赛; 竞争者; [生]生存竞争;
The competition attracted over 500 contestants representing 8 different countries.
The winners of the competition will be announced next month.
An independent regulator will be appointed to ensure fair competition.
Sometimes it is convenient and time saving to keep a catalogue of relevent ads at hand.
A great first step and time saving tool for anyone who frequently does organizational sport scheduling.
Tabbed Browsing is a modern and time saving feature.
In no case will they look on passively.
They were at first grudgingly and later passively accepted.
People do not merely passively respond to the world.
v.由…组成( consist的现在分词 ); 包括; 存在于; 表现为（常与 in 连用）;
Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide.
David Fincher paints from a palette consisting almost exclusively of grey and mud brown.
A couple consisting of only two vectors is called a simple couple.