This is why human modification of rivers is such an important subject when it comes to conserving this species and others.

However, many protected areas have some degree of human modification or activity, so a definitive estimate of true wilderness is difficult.

However, local changes and fragmentation of distribution due to human modification of its habitat are documented.

Both of these artifacts display evidence of possible human modification which will be discussed in detail below.

The small amount of habitable land has prompted significant human modification of the terrain over many centuries.

Frankenstein is an impressive scientist, who has researched human modification .

Other examples include bone that show signs of human modification, fire cracked rocks from a hearth or plant material used for food.

Cultural ecology retained Sauer's interest in human modification of the landscape and pre-modern cultures.

A third possibility is that human modification of the environment, particularly through the use of fire, indirectly led to their extinction.