Global warming | Definition, Causes, Effects, Solutions, Facts . . . Global warming, the phenomenon of increasing average air temperatures near Earth’s surface over the past one to two centuries, happens mostly in the troposphere, the lowest level of the atmosphere, which extends from Earth’s surface up to a height of 6–11 miles
Climate change - Wikipedia Present-day climate change includes both global warming —the ongoing increase in global average temperature —and its wider effects on Earth's climate system Climate change in a broader sense also includes previous long-term changes to Earth's climate
Home – Climate Change: Vital Signs of the Planet There is unequivocal evidence that Earth is warming at an unprecedented rate Human activity is the principal cause Why Is Climate Change Happening? Human activities are driving the global warming trend observed since the mid-20th century What Are the Effects of Climate Change?
What Is Climate Change? - NASA Science Climate change is a long-term change in the average weather patterns that have come to define Earth’s local, regional and global climates These changes have a broad range of observed effects that are synonymous with the term
What are the effects of global warming? | National Geographic One of the most concerning impacts of global warming is the effect warmer temperatures will have on Earth's polar regions and mountain glaciers The Arctic is warming four times faster than
Causes and Effects of Climate Change | United Nations As greenhouse gas emissions blanket the Earth, they trap the sun’s heat This leads to global warming and climate change The world is now warming faster than at any point in recorded history
What Is Global Warming? - Live Science Global warming is the rise in average temperatures across the globe, which has been ongoing at least since record keeping began in 1880