rmbaos

个人拙见哈，请指教：
the most obvious effects, and those that would have the largest impact on people
and后面的部分像是对effects的进一步解释，those核心词指代effects，that定语从句修饰those
这个结构像同位语，是对obvious effects 大范围里面对人类影响大的那部分小范围的解释。and去掉应该也没错。
让我想起了一个很像的句子：
Sales of wines declined in the late 1980s, but they began to grow again after the 1991 report that linked moderate consumption of alcohol, and particularly of red wine, with a reduced risk of heart disease.
这个里面particularly of red wine是对前面consumption of alcohol的进一步解释

and在这里只是强调语气而已~结构无大碍