Fundamentally, momentum conservation is linked to invariance under space translations. See Noether's theorem. If you want to find a system that does not conserve momentum you should look for situations where space is not uniform, e.g. balls rolling on the surface of a bowl, a planetary system (when the dynamics of the sun is neglected), etc.
Socorro is a city in Socorro County in the U.S. state of New Mexico. It is in the Rio Grande Valley at an elevation of 4,579 feet (1,396 m). In 2012 the population was 8,906.
Albuquerque is fairly isolated, and it's a four-hour drive to the nearest city of similar size. The city proper has a population estimated at 558,000 in 2014, with a metropolitan population of 903,000. The MSA includes Rio Rancho, Bernalillo, Placitas, Los Lunas, Belen, Bosque Farms and Corrales.