Explanation:
The use of carbon-14 has some advantages over other radioisotopes and also over other dating methods, for example:
- Dating fossils, since all living carbon-based organisms acquire carbon by photosynthesis or consumption of plants and animals, all living things can be dated with this method.
- It is not limited, this is a way of saying that its effective range is very wide, it allows dating to a maximum of 62,000 years
- It has oceanographic and climatic utilities
- Dating of aquifers, carbon-14 decomposes constantly even underwater
My guess would be Los Angeles because they have been known to have serious, long term droughts. They are also on the west coast, so they have plenty of ocean water that could be used for desalination.
The "Census Tract" is an area roughly equivalent to a neighborhood established by the Bureau of Census for analyzing populations. They generally encompass a population between 2,500 to 8,000 people. Bureau of Census describes them as "relatively permanent", but they do change over time.
