Final answer:
The environmental impacts of neighborhoods built around an incinerator include air pollution from the release of pollutants during burning, potential groundwater contamination from toxic chemicals, and air pollution adding to smog.Hence, the correct answer is option B.
Step-by-step explanation:
When neighborhoods are built around an existing incinerator, the environmental impact could include various forms of pollution. One of the possible impacts is that pollutants can be released into the air during the burning process. These can include carcinogens and other toxic chemicals which may increase air pollution and contribute to smog formation. This form of pollution can impact human health and the environment substantially.
In addition to air pollution, toxic chemicals from the waste being burned or from the resultant ash can leach into the groundwater, posing risks to public health and ecosystems. Landfill operations near the incinerator could also contribute to groundwater contamination due to leachate, which is a polluted liquid that can form when water percolates through waste material.
The interaction of organic matter and certain conditions in landfills can lead to the production of methane gas, which can be hazardous. However, it's less common for residents to be exposed to methane through contact with ash; typically, methane would be encountered in the landfill environment itself rather than the incineration process.