Zheng says that even though he was just providing basic physical labor, his interactions with locals made him profoundly aware of the severity of the impact of global warming on global ecosystems.
他指出，自己雖然只是進行簡單的體力勞動，但藉由和當地居民的互動，他才深深體認到全球暖化對地球生態的負面影響有多嚴重。