The environment is everything around us, including living and nonliving things, and it's essential for life on Earth. We should save the environment because it: 

Sustains life: The environment provides us with air, water, food, and other resources for survival. 

Protects ecosystems: The environment's ecosystems are the foundation of life on Earth, and they provide many benefits to humans. 

Improves human health: A healthy environment helps prevent diseases and improves people's health. 

Alleviates climate change: Preserving the environment helps prevent global warming, which has contributed to the deaths of many humans and animals. 

Safeguards animals: Environmental preservation helps protect animals and increase the population of endangered species.