呢句點解???

Not appropriate to translate the meaning of the whole sentence just word by word.

My suggested ans.:
保護生態環境團體的領導人認為: 環境污染的惡化導致及激起了
各界人士的抗議示威, 及所引起的騷亂。


(Hope I can help you.)

pollution fuels protests and riots,says environment boss
環保領導人士說：污染燃料抗議和騷亂

環保人士首領說：燃料污染的抗議及騷亂