Which two countries signed the 'Air Quality Agreement' also known as ("Acid Rain Treaty") in 1991?
Correct answer: USA and Canada

Megan
ZyggyStardust, What a crock ! You're joking right ? Trump taking US out of Paris climate agreement. Oh yes...he really cares about the rest of the planet.

Player #8258475
ZyggyStardust, Utter crap. The rest of the world is way ahead of you! The Trump admin is hostile towards climate change. CAT describes your efforts as woefully inadequate, and on the list of countries and their efforts to reduce emissions the USA is right down there at the bottom along with China under the heading of 'hardly trying'. Saying 'fact' does not make it so.

Nexus 6
Very glad to hear about the progress made on acid rain. Now if only we could do something to mitigate the wildfires and resulting smoke in both countries.