Other people argue that humans should study nature, gather information, and choose the best actions to help forests.
Healthy forests feature trees of varying ages and are able to fend off pests and diseases.

Even if left alone, habitats will change over time. Some species may disappear if when their habitat naturally changes or vanishes —and they have nowhere else to go.

Unmanaged forests such as national parks are experiencing problems such as pine beetles. Unmanaged forestry is contributing to Western North America's very large forest fires.

Conservationists argue forests should be managed to achieve a balance of life. Biologists, foresters and others, including farmers, first nations people, and other private land owners, should work together to improve this balance.

For example, knowing what kinds of habitat different species prefer helps us to enjoy and manage wildlife. By making changes to habitat, we can encourage wildlife to live in places where we’d like to have them. We can also discourage wildlife by making changes. If a habitat doesn’t meet their needs, they will leave.

Sometimes wildlife cause problems for people. Animals may be in inconvenient places, such as near homes, schools, farms, and airports. Sometimes their search for food and shelter results in damage to property or crops. Unwelcome wildlife or trees, especially invasive species, may be removed to preserve habitat.

“Citizen scientists” gather information and record and report it for many different kinds of studies. They contribute scientific research about trees, birds, and animals. Some citizen scientists are farmers, hunters, and fishermen who spend a great deal of time outdoors observing wildlife.