Diseases and aggressiveness usually
Many snakes can be harmful, but they benefit us by eating rodents such as: mice, rats, and etc. that might carry diseases. Spiders can be harmful as well, they benefit us by eating insects like: house flys, mosquitos, and other insects. They keep the bug population at a normal level.
Ratcon is a brand of pest control used to kill birds and rodents. It is harmful to birds of prey who eat rodents that have been poisoned with it.
Uh, they're big rodents... I guess they could hurt you if they wanted to.
If the inscet has a sickness they can pass it to us.
It protects us from harmful activities like skin cancer, cataracts. It protects us from the harmful UV light.
Predators such as tigers and crocodiles can kill you. Non-predators such as cows and horses can crush you to death. Some also carry diseases and spread germs, especially rodents.
Some give us nutrients. Some are harmful.
some are harmful but some are not harmful
Rodents carry many diseases and can transmit these diseases to people.
Weathering is harmful to people because it changes the environment and can cause us to get sick from season changing.Weathering can also cause great damages to villages because of landslides.
Electromagnets are not harmful to people.
Yes it is harmful to people.