Which of the following generate the type of externality previously described? Check all that apply. The local airport has doubled the number of runways, causing additional noise pollution for the surrounding residents. Jacques has planted several trees in his backyard that increase the beauty of the neighborhood, especially during the fall foliage season. A leading software company has decided to increase its research budget for inventing new open-source technologies. Your roommate Musashi has bought a bird that keeps you up at night with its chirping.