Introduction:
D.D.T. stands for Dichlorodiphenyltrichloroethane. It is a synthetic organic compound that has been widely used as an insecticide since the 1940s. D.D.T. has had a significant impact on human health and the environment due to its persistence and toxicity.

Non-biodegradable pollutant:
One of the key characteristics of D.D.T. is that it is a non-biodegradable pollutant. This means that it does not break down easily in the environment and remains in the ecosystem for a long time. When D.D.T. is released into the environment, it can accumulate in soil, water, and organisms over time. This accumulation can have detrimental effects on the environment and organisms, including humans.

Impact on the environment:
D.D.T. has been found to have harmful effects on various organisms in the environment. It is highly toxic to aquatic life, including fish and other aquatic organisms. When D.D.T. is present in water bodies, it can bioaccumulate in the bodies of organisms, leading to a magnification of its concentration up the food chain. This can result in severe ecological imbalances and the disruption of entire ecosystems.

Furthermore, D.D.T. is known to have a detrimental impact on bird populations. Birds that consume organisms contaminated with D.D.T. can experience reproductive issues, such as thinning of eggshells, which can lead to reduced hatching success and population decline. The most well-known example of this is the near extinction of the bald eagle in the United States due to D.D.T. contamination.

Human health concerns:
D.D.T. is also a concern for human health. It has been linked to various health issues, including cancer, reproductive problems, and developmental abnormalities. Additionally, D.D.T. can enter the human body through the consumption of contaminated food, particularly fatty animal products. Once inside the body, D.D.T. can accumulate in fatty tissues and potentially have long-term health effects.

Conclusion:
In conclusion, D.D.T. is a non-biodegradable pollutant that has had significant environmental and health impacts. Its persistence in the environment, toxicity to organisms, and ability to accumulate in the food chain make it a major concern for the well-being of ecosystems and human populations. The use of D.D.T. has been banned or restricted in many countries due to these concerns, highlighting the importance of finding safer and more sustainable alternatives for pest control.