Global Climate Scenarios: Emissions

Part 8 of United States Climate Change Impact. Some continued warming of the planet is projected over the next few decades due to past emissions. Choices made now will influence the amount of future warming. Lower levels of heat-trapping emissions will yield less future warming, while higher levels will result in more warming, and more […]

Heat Trapping Gases & Other Climate Change Influences

Part 4 of United States Climate Change Impact. Carbon dioxide concentration has increased due to the use of fossil fuels in electricity generation, transportation, and industrial and household uses. It is also produced as a by-product during the manufacturing of cement. Deforestation provides a source of carbon dioxide and reduces its uptake by trees and […]

Global Climate Change: Introduction

Part 3 of United States Climate Change Impact. Key Messages: Human activities have led to large increases in heat-trapping gases over the past century. Global average temperature and sea level have increased, and precipitation patterns have changed. The global warming of the past 50 years is due primarily to human-induced increases in heat-trapping gases. Human […]