题目

阅读理解 On average, primary school children in England have at leastthree sugary snacks a day, Public Health England (PHE) found. This means thatthe sugar they consume is three times more than the recommended maximum. Children between the ages of 4 and 10 consume 51.2% of sugarfrom unhealthy snacks. PHE has launched a campaign, Change4Life, to encourageparents to look for healthier snacks of no more than 100 calories, and to limitthem to two a day. The campaign advises parents to give their children amaximum of two snacks a day, with each containing no more than 100 calories.The campaign 读漫画“人口爆炸”，回答问题。  （1）当今世界人口问题主要表现为_________________，请举一个例子说明这一问题给社会、环境带来的影响？___________。   （2）面对当今世界主要人口问题，人类应当采取哪些措施_____？ （3）人口问题还表现在城市人口迅速膨胀，带来一系列城市问题，如 _____、_____、____、____等。