Acid rain and global warming are inseparable since the later is a direct beneficiary of the former. Acid pollution has one surprising effect that may be beneficial. Sulfates in the upper atmosphere reflect some sunlight out into space, and thus tend to slow down global warming. Scientists believe that acid pollution may have delayed the onset of warming by several decades in the middle of the 20th century. Whatever the case, it has been scientifically proven that acid rain and global warming cannot be separated if we are to make any progress in minimizing the possible harmful effects created by global warming.