Silver has antibacterial properties. This precious metal has been used to fight infection for thousands of years. Hippocrates first described its antimicrobial properties in 400 B.C.E.
monerans are helpful to humans because it is bacteria and bacteria helps humans by making milk yogurt
An aolovera plant is helpful
no
Ladybugs are indeed helpful to humans, because they eat aphids, and aphids are damaging to many plants that we humans like to grow.
Humans use silver
Some people are... *_*
no
cause
you can eat them
Helpful in the stratosphere, harmful in the troposphere.
computer.. both helpful and not..
all that i can think of is gives humans meat to eat