The main categories include pollution, climate change, resource depletion, and loss of biodiversity.

Pollution involves the introduction of harmful substances into the environment, affecting air, water, and soil quality. Common types include air pollution from emissions, water pollution from contaminants, and soil pollution due to chemical spills.

Pollution can lead to health problems in humans and animals, damage ecosystems, and contribute to the deterioration of natural resources.

Climate change results in rising temperatures, altered weather patterns, sea level rise, and increased frequency of extreme weather events, which threaten ecosystems and human communities.

Non-renewable resources such as fossil fuels, minerals, and certain water sources are being consumed faster than they can be naturally replenished, leading to scarcity.

Depletion can cause economic challenges, environmental degradation, and increased competition for remaining resources.

The reduction of species diversity hampers ecosystem resilience, disrupts ecological balance, and can threaten food security and human well-being.