Which of the following is a source of point pollution?
a.unlined landfill
b.runoff from city streets
c.precipitation containing air pollution
d.runoff from farms
d
Yep, it is d.
To determine which of the options is a source of point pollution, we need to understand what point pollution is. Point pollution refers to pollution that comes from a specific, identifiable source, such as a pipe or a discharge point. It is often easier to control and regulate compared to non-point pollution, which comes from diffused sources.
Now let's analyze each option to determine which one is a source of point pollution:
a. Unlined landfill: While landfills can contribute to pollution, they typically produce non-point pollution, as pollutants seep into the ground and contaminate surrounding areas rather than coming from a specific source.
b. Runoff from city streets: This is an example of non-point pollution. When rainwater washes over city streets, it collects various pollutants such as oil, chemicals, and litter, which then flow into storm drains and water bodies without a specific point of origin.
c. Precipitation containing air pollution: This is also a form of non-point pollution. When pollutants (such as sulfur dioxide or nitrogen oxides) are released into the air, they mix with water vapor and form acid rain or other forms of precipitation, which then affects a wide area rather than originating from a specific source.
d. Runoff from farms: This is an example of point pollution. When agricultural activities produce excess runoff containing fertilizers, pesticides, and washout from livestock waste, it can directly enter water bodies through specified outlets, making it easier to identify and control.
Therefore, the correct answer is d. Runoff from farms is a source of point pollution.