as varied as

请教以下几个问题

1 So-called green taxes, which exact a price for the use of polluting or nonrenewable fuels, are having a positive effect on the environmental and natural resource base of countries as varied as China, the Netherlands, and Hungary.尤其是后半句的意思

2 the estimated population 和 the population's estimated amount有什么区别吗

3 The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970's后面more than 的对象是什么呢

4 Mideast immigtants's rates of entrepreneurship exceed virtually every other immigrant group in the increasingly divers United States economy中diver作动词？整句话是什么意思呢

谢谢

4 divers做形容词吧。

在越来越多的多样化的美国经济中，中东移民做生意的比例实际上超过了别的移民群体