Human Factors

Human factors such as population growth, consumption per person, and values have become a major influence on Earth's climate.

Apartment complex in Hong Kong. Humans are responsible for a major portion of the observed rapid changes in Earth's climate.

Stewart Johnston

 Consumption

Population

Values

Recently Updated
Human-caused climate change a factor in Mediterranean droughts Last Updated on 2011-10-28 00:00:00 Human-caused climate change a major factor in more frequent Mediterranean droughts Winter precipitation trends in the Mediterranean region for the period 1902 - 2010. High Resolution (Credit: NOAA) Wintertime droughts are increasingly common in the Mediterranean region, and human-caused climate change is partly responsible, according to a new analysis by NOAA scientists and colleagues at the Cooperative Institute for Research in Environmental Sciences (CIRES). In the last 20 years, 10 of the driest 12 winters have taken place in the lands surrounding the Mediterranean Sea. “The magnitude and frequency of the drying that has occurred is too great to be explained by natural variability alone,” said Martin Hoerling, Ph.D. of NOAA’s Earth System Research Laboratory in Boulder, Colo., lead author of a paper published online in the Journal of Climate ... More »
Climate Change Skepticism Last Updated on 2010-12-08 00:00:00 This article, written by Charles W. Schmidt*, appeared first in Environmental Health Perspectives—the peer-reviewed, open access journal of the National Institute of Environmental Health Sciences. The article is a verbatim version of the original and is not available for edits or additions by Encyclopedia of Earth editors or authors. Companion articles on the same topic that are editable may exist within the Encyclopedia of Earth.   A Closer Look at Climate Change Skepticism Debate over climate change is nothing new. Scientists have been arguing about whether greenhouse gases released by human activity might change the climate since the late nineteenth century, when Swedish chemist Svante Arrhenius first proposed that industrial emissions might cause global warming.1 Fueled by partisan bickering, this dispute now is more bellicose than ever. Skeptics... More »
Lecture: Stephen Schneider Climate Change Mitigation and Adaptation Video Last Updated on 2010-10-07 00:00:00 This video is of a lecture that Stephen Schneider presented a number of times. It covers climate change from a risk perspective, discussing the underlying science, uncertainties, and implications of different possible decisions. Here is it captured with many (although not all) of his graphics. It is a well organized, evenly presented lecture that carefully differentiates questions of "what we know" from "what we should do." It presents data and modelling at a level appropriate for undergraduates. More »