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Avoid using horse-drawn carriages to get around busy cities. Citing information drawn from the high profile medical journal, The Lancet, Animal Aid (www.animalaid.org.uk), points out that animals exposed to ozone pollution present in dense urban areas are at increased risk for fatal respiratory illnesses and accelerated ageing. Knowing this makes the ride less romantic. The site also explains that there are very few regulations governing working conditions for these animals.