Fireworks are equal parts lovely and ugly—lovely because, well, they’re fireworks, and who doesn’t enjoy a good pyrotechnic sky show? The ugly part comes mostly after, in the haze of toxic gases and particles the blasts produce, along with the rain of paper, cardboard, and metal debris, and the lingering trauma to pets and wildlife, who take a lot less pleasure from the bangs and flashes than we do. According to estimates by the American Pyrotechnics Association (APA), the average July 4th in