ACIDRAIN

• Corrosive stuff from the sky

• Deleterious precipitation

• Destructive precipitation

• Ecological danger

• Ecological problem

• Environmental awareness topic

• Environmental concern

• Environmental hazard

• Environmental issue

• Environmental problem

• Environmental woe

• Environmentalist's concern

• EPA concern

• EPA worry

• Falling pollution

• Formerly volatile U.S.-Canada issue

• Harmful downfall

• Harmful fall

• Harmful precipitation

• Hazard that falls from the sky

• Low-pH precipitation

• One cause of deforestation

• Pollutant linked to fossil fuels

• Polluted precipitation

• Terror from the skies?

• Threat to alfresco artwork