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claudettoterohil
The main cause of extinction on Earth today is, Humans, we are the biggest 
threat to our environments'.





Hope that helps!!!! ( We Humans, are our biggest enemy, and threat to ourselves, and he environment.).
lazy58
Fossil fuels. These are burned by us humans and co2 is released into the atmosphere contributing to global warming which then causes the ice to melt causing the water sea levels to rise making it harder for animals such as polar bears to get food also because it’s harder for them to get food they will have to leave their children vulnerable to predators for longer.