It's reported that millions of people still live b

问题补充：

Its reported that millions of people still live below the poverty line,to

答案：

Its reported that millions of people still live below the poverty line, to which the approach lies in economic growth.

the approach to： 对待或处理……的方式

据报道,数百万的人仍然生活在贫困线下,处理这个的方法存在于经济增长.

先行词是前面的that从句.

Another would be to revise the approach toscience communication and popularisation.

另外一个问题是要改善科学传播与科学普及的方法.