原句： Air pollutiong can have a negative impact on people's health. For example, people living in areas in poor air quality are prone to respiratory disease.空气污染会对人们的健康产生负面影响。例如，生活在空气质量差的地区的人们容易患呼吸道疾病。
改写出来的两句是同义句，都是非限制性定语从句，一个用的主动语态，一个用的被动语态。
1 Air pollutiong can have a negative impact on people's health，as the rise in respiratory disease in areas with poor air quality attests.空气污染可能对人们的健康产生负面影响，这一点可以从空气质量差的地区呼吸道疾病的增加得到证明。
as the rise in respiratory disease in areas with poor air quality attests，此部分是非限制性定语从句，as是关系代词“这一点”作宾语，the rise in respiratory disease in areas with poor air quality 是主语部分，the rise是主语，in respiratory disease in areas为定语修饰rise, with poor air quality 为定语修饰areas, 及物动词attests是谓语动词，是主动语态。
2 Air pollutiong can have a negative impact on people's health，as is attested by the rise in respiratory disease in areas with poor air quality. 空气污染会对人们的健康产生负面影响，这一点可以从空气质量差的地区呼吸道疾病的增加就可以得到证明。
as is attested by the rise in respiratory disease in areas with poor air quality，此部分是非限制性定语从句，as是关系代词“这一点”作主语，is attested是谓语动词,是被动语态，介词短语by the rise in respiratory disease in areas with poor air quality 是状语，引出执行者，the rise是介词by的宾语，in respiratory disease in areas为定语修饰rise, with poor air quality 为定语修饰areas, 。
追问请问写作的是不是在as...attest 中间直接加上主语部分就行了？
追答是的，as sb./sth. attest "某人/某事证明这一点"
追问好的谢谢