Oct 21, 2024 · What Is Climate Change? 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 …

Dec 14, 2025 · Climate change, the periodic modification of Earth’s climate caused by atmospheric changes and the atmosphere’s interactions with geologic, chemical, biological, …

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 …

Apr 10, 2025 · Climate change is the long-term alteration of temperature and typical weather patterns in a place. Climate change could refer to a particular location or the planet as a …

Oct 29, 2025 · What is climate change? Climate change is the long-term shift in the Earth's average temperatures and weather conditions. The world has been warming up quickly over …

Jul 27, 2025 · Climate change is not a distant warning—it is the story of our time, unfolding before our eyes. But what exactly is climate change? Why is it happening? And perhaps most …

Expert-written overviews of climate change science, solutions, and related topics.

The earth's climate is changing. Multiple lines of evidence show changes in our weather, oceans, ecosystems, and more. The buildup of greenhouse gases in our atmosphere and the warming …

Sep 14, 2021 · Climate change is the long-term change in the observed patterns, meaning variations go beyond those previously observed. When we use the word climate change, we …

Sep 1, 2021 · What is climate change? Climate change is generally defined as a significant variation of average weather conditions—say, conditions becoming warmer, wetter, or …