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  1. What Is Climate Change? - Science@NASA

    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 changes have a …

  2. Climate change | Definition, Causes, Effects, & Facts | Britannica

    3 days ago · Climate change, the periodic modification of Earth’s climate caused by atmospheric changes and the atmosphere’s interactions with geologic, chemical, biological, and geographic factors.

  3. What is climate change? A really simple guide - BBC

    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 the past 100 …

  4. 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 …

  5. What Is Climate Change? | United Nations - الأمم المتحدة

    Climate change refers to long-term shifts in temperatures and weather patterns. Such shifts can be natural, due to changes in the sun’s activity or large volcanic eruptions. But since the 1800s,...

  6. Basics of Climate Change - US EPA

    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 of the …

  7. Climate Change - National Geographic Society

    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 whole. Climate change …

  8. Explainer: What Is Climate Change? - Earth.Org

    Sep 14, 2021 · We’ve been hearing about climate change more than ever in the past two decades, but the science often remains murky, and headlines become more difficult to trust by the day. Here, we …

  9. Yale Experts Explain Climate Change

    Experts Dan Esty and Miranda Massie break down one of the most pressing environmental and social challenges of our time. How do we define climate change? Climate change is the long-term change …

  10. Climate Change 101 - Cornell University

    Learn about key concepts related to climate change, including its human-driven causes, the impacts on the environment and health, and the solutions needed to reduce its effects.