Mankind, and largely through excessive procreation
It's time the nations of the world sign a treaty on inhibiting population growth
Short term, mankind. Long term, the evolution of the Sun.
mankind
the main and biggest problem the mankind is facing today is pollution and overpopulation
The okapi's biggest threat, enemy, is mankind. Okapi's are endangered today because of man. There are more predators to the okapi such as members from the big cat family.
Jellyfish are eaten by squid. I believe that this is the biggest threat that they face.
the market economy was the single biggest threat
Churchill thought that Hitler was the biggest threat in WW2
Biggest threat is a landowner with a 22 rifle or 12ga shotgun.
the biggest bomb known in mankind is a nuclear bomb :)
you are
Itself
a lion.