Acid rain is caused largely by sulfur dioxide and oxides of nitrogen emitted by
industrial activities such as cos burning. The
gases dissolve in rainwater to form acids. Much
of this industry is based in the United States,
but the wealth exports pollution north of the
border. Between 50% and 70% of Canada's
acid rain comes from the United States, while
only 2-10% of America's pollution in this area
comes from Canada.

the answer is d: message a character's thoughts

to me i think class room sitting education is better. i do online school and i have not learned a think haha. when i sit in the classroom i just sit there and kind of pay attention but still i get so far ahead in the class when im doing online i have nothing else better to do but play video games and i sit in school and learn and have friends and just actually learn. when i'm doing online i sit here listing to music and get on and and look up the answers i guess that is my fault for being a cheater. but to be honest i think sitting in the classroom is better.

since he could see color, and nobody else could, he didn't find it fair that everyone else in the utopia couldn't see color but him and the giver : d