(1)So why is this huge increase in population taking place? 

参考译文(1)：那么为什么会出现人口的大量增长呢？

以上为疑问副词why引导特殊疑问句，属于简单句中特殊疑问句，用来提出疑问，即“问某事的原因”

状语：so(那么）

状语 ：why（为什么）

主语：this huge  increase（这样巨大增长）

后置定语：in population（在人口方面）

谓语：is taking place（正在发生/出现）

(2)It is really due to the spread of the knowledge and practice of what is becoming known as “Deat control”.

这两个句子分别分析一下句子成分吧？谢谢老师了

参考译文(2) ：这的确是由于知识的广泛传播和众所周知的“死亡控制的实行而造成的结果。

主语：It（它）

系动词：is（是）

状语 :really（的确）

表语：due to the spread of the knowedge and practice of what  is becoming known as "Death control"

表语的结构为：表原因关系的介词短语due to +名词短语(1) of +and +名词短语(2)of what 宾语从句(备注：what在介词宾语从 句 中充当主语成分）

重点短语解析：

(1)due to 由于/因为

(2)the spread of the knowledge 知识的传播

(3)practice of ...的实践/实行/实施

(4) what is becoming known as "Death control"被众所周知的”死亡控制实行的结果"

(5) become known as  被认为是; 号称; 叫做

A be known as  B 可以看作是  know A as B被动语态结构

(1) know A  as B认为…是；把…看作是

 Lots of people know her as a very kind woman.

很多人认为她是个非常善良的女人。

We know them as inaccurate and misleading property descriptions.

我们认为对性状的这些描述是不准确的，且会使人产生误解。

He was born as John Birks Gillespie, but everyone knew him as Dizzy 

他本名为约翰·伯克斯·吉莱斯皮，但人人都叫他“小迷糊”

(2)  A be known as B 称为；叫做 

The disease is more commonly known as Mad Cow Disease.

这种疾病更通俗的名称是疯牛病。