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Pesticides can negatively affect the environment by contaminating soil and water, harming non-target organisms like bees and beneficial insects, and contributing to the development of pesticide-resistant pests. They can also pose health risks to humans through exposure from consumption of contaminated food or direct contact during application.

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1y ago

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How do pesticides affect soil fertility?

Pesticides can have both negative and positive effects on soil fertility. While some pesticides can harm beneficial soil organisms and decrease soil organic matter, others can help control pests and preserve soil fertility by preventing crop damage. Using pesticides judiciously with proper application techniques can minimize negative impacts on soil fertility.


Why do pesticides become ineffective over time?

Pesticides can become ineffective over time due to the development of resistance in target pests, where they evolve to withstand the pesticide's effects. Additionally, repeated use of the same pesticide can lead to the buildup of residues in the environment, reducing its effectiveness. Environmental factors like temperature, humidity, and soil type can also affect the breakdown and efficacy of pesticides.


How can humans negatively affect the pH levels in water?

Humans can negatively affect water pH levels through activities like industrial pollution, agricultural run-off, and dumping of chemicals and waste into water bodies. These activities can introduce acidic or alkaline compounds into the water, causing pH levels to shift outside of the ideal range for aquatic life.


What are persistent pesticides?

Persistent pesticides are chemicals that remain in the environment and can accumulate over time in soil, water, and organisms. These pesticides do not easily degrade, which can lead to long-lasting environmental and health impacts. Examples include organochlorine pesticides like DDT and chlordane.


What are pesticides made from?

Pesticides can be made from synthetic chemicals, natural products, or a combination of both. Common synthetic pesticides are derived from chemicals like organophosphates, carbamates, and pyrethroids, while natural pesticides can be sourced from plants (e.g., neem oil) or microbes (e.g., Bacillus thuringiensis).