Factories emit toxic fumes, , Water pollution can wipe out fish and plant species, , I can't make out what it says here, , Acid rain poisons trees and plants, , Solar power can be used to heat homes, , Can I join the Eco-helpers club?, , The government has been trying to reduce pollution for years, , I have been volunteering to clean out ponds for a year now, .

Module 8

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恢復自動保存: ?