Wilderness or wildlands are natural environments on Earth that have not been significantly modified by human activity, or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally referred to terrestrial environments, though growing attention is being placed on marine wilderness. Recent maps of wilderness suggest it covers roughly one-quarter of Earth's terrestrial surface, but is being rapidly degraded by human activity. Even less wilderness remains in the ocean, with only 13.2% free from intense human activity.
White Goat Wilderness Area in Canadian Rockies, Canada
Stephen Mather Wilderness in the U.S. state of Washington
Innoko Wilderness in the U.S. state of Alaska in the summer
A view of wilderness in Estonia
Human impact on the environment
Human impact on the environment refers to changes to biophysical environments and to ecosystems, biodiversity, and natural resources caused directly or indirectly by humans. Modifying the environment to fit the needs of society is causing severe effects including global warming, environmental degradation, mass extinction and biodiversity loss, ecological crisis, and ecological collapse. Some human activities that cause damage to the environment on a global scale include population growth, neoliberal economic policies and rapid economic growth, overconsumption, overexploitation, pollution, and deforestation. Some of the problems, including global warming and biodiversity loss, have been proposed as representing catastrophic risks to the survival of the human species.
Chart published by NASA depicting CO2 levels from the past 400,000 years.
Lacanja burn
Fishing down the foodweb
Urban sprawl in California