Any dog can, especially those dogs that have been treated so inhumanely that it feels it's only defense is to attack a human, or have not be socialized at all, or have been taught by their owners that it's okay to be so nasty and vicious to strangers.
House fly
Pneumonic Plague, if not treated within the first 24 - 48 hours of infection, the mortality rate is 100%. If it is, the mortality rate is 75%.
the mosquitoe
cancer
Overall, lighitng kills the most people, though tornadoes are not far behind.
the thing is there is a different amount every year so there is no real answer
the most harmful disease in the world is cancer (it kills the most people).
Love
is it cocaine or tobacco The answer above is incorrect, as cocaine is not legal and tobacco is not a drug. Alcohol is most likely the answer to your question, it is legal and also kills thousands of people each year, some of which were not even using the drug... but were victims of the effects the alcohol had on the person who killed them.
Most people killed in tornadoes are struck by or crushed under flying or falling debris.
rabbits are the most reproductive animals on earth. they breed 100 bunnies a year....each.
it is nasty nick for sure he kills every nearly