- Climate change: Rising temperatures, changing precipitation patterns, and other climate-related changes can make it difficult for species to survive.
- Pollution: Chemicals and other pollutants can contaminate air, water, and soil, making it difficult for species to survive.
- Invasive species: Non-native species that are introduced to an area can outcompete native species for food and resources, leading to their decline.
- Overexploitation: Hunting, fishing, and other forms of overexploitation can reduce populations of species to unsustainable levels.
- Disease: Diseases can spread quickly and easily through populations of plants and animals, leading to their decline.