https://www.khanacademy.org/science/strengthened-shs-biology-2/x62f5297cda63eb8d:plant-organ-systems/x62f5297cda63eb8d:importance-of-plants/v/bhp-atmosphere-climate 2023-10-12T14:09:03.712558587Z WATCH: The Atmosphere and Climate Earth's climate has always changed due to natural cycles. But human activities, especially since the Industrial Revolution, have increased carbon dioxide levels, intensifying the greenhouse effect. This human-induced global warming could raise temperatures more than typical natural fluctuations, threatening habitats and causing sea-level rise. To combat this, global commitment to energy conservation, sustainable energy, and forest preservation is needed. Big History Project video https://cdn.kastatic.org/googleusercontent/yRX2cJC5JYpwonfB5Xvt6R8s_nWRSpGYLjtVjQakRHiNZWod55B1fHdto2xZJgGxABtaP0l9lBZjGI2Gw9ESQrwZ WATCH: The Atmosphere and Climate Earth's climate has always changed due to natural cycles. But human activities, especially since the Industrial Revolution, have increased carbon dioxide levels, intensifying the greenhouse effect. This human-induced global warming could raise temperatures more than typical natural fluctuations, threatening habitats and causing sea-level rise. To combat this, global commitment to energy conservation, sustainable energy, and forest preservation is needed. https://cdn.kastatic.org/ka-youtube-converted/Jfaipkw691E.mp4/Jfaipkw691E.mp4 219 Atmosphere and climate https://www.khanacademy.org/science/grade-8-science-tx/x3cd7525f789ab4f1:climate-change/x3cd7525f789ab4f1:changes-in-earth-s-climate-system/v/natural-changes-in-climate 2025-07-01T18:08:15.179962416Z Natural changes in climate Earth's climate has changed over time due to natural events and processes. Volcanic eruptions, meteorite impacts, ocean currents, and greenhouse gases have all driven changes in climate—sometimes suddenly, sometimes slowly. Scientists use ice cores, tree rings, and other natural records to uncover how these forces shaped Earth's past climate across centuries and millennia. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/a69f9ed1-04d5-4158-b7c1-ba659c686477_1280_720_base.png Natural changes in climate Earth's climate has changed over time due to natural events and processes. Volcanic eruptions, meteorite impacts, ocean currents, and greenhouse gases have all driven changes in climate—sometimes suddenly, sometimes slowly. Scientists use ice cores, tree rings, and other natural records to uncover how these forces shaped Earth's past climate across centuries and millennia. https://cdn.kastatic.org/ka-youtube-converted/KIcrEAEXXgk.mp4/KIcrEAEXXgk.mp4 394 Atmosphere and climate https://www.khanacademy.org/science/grade-8-science-tx/x3cd7525f789ab4f1:climate-change/x3cd7525f789ab4f1:changes-in-earth-s-climate-system/a/natural-changes-in-climate 2025-07-09T20:41:48.967358068Z Natural changes in climate Learn about how natural events (such as volcanic eruptions, meteorites, and changes in ocean currents) can affect climate. article https://www.khanacademy.org/science/grade-8-science-tx/x3cd7525f789ab4f1:climate-change/x3cd7525f789ab4f1:changes-in-earth-s-climate-system/e/understand-natural-changes-to-climate 2026-03-14T07:10:38.271946002Z Understand: natural changes in climate Check your understanding of how natural events influence climate in this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise https://www.khanacademy.org/science/grade-8-science-tx/x3cd7525f789ab4f1:climate-change/x3cd7525f789ab4f1:changes-in-earth-s-climate-system/e/apply-natural-changes-in-climate 2026-02-27T18:20:42.63281182Z Apply: natural changes in climate Apply your understanding of how natural events influence climate in this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-and-society/x87d03b443efbea0a:earths-changing-climate/v/earths-changing-climate 2025-07-01T18:08:15.179962416Z Earth's changing climate Earth's temperature and weather patterns have changed rapidly over the past century. This process, known as climate change, is caused mainly by human activities, especially CO₂ emissions. To avoid the worst impacts of climate change, we need to both reduce emissions and remove excess CO₂ from the atmosphere. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/b5d3f3c1-1fcf-4639-87b1-1da887ae0544_1280_720_base.png Earth's changing climate Earth's temperature and weather patterns have changed rapidly over the past century. This process, known as climate change, is caused mainly by human activities, especially CO₂ emissions. To avoid the worst impacts of climate change, we need to both reduce emissions and remove excess CO₂ from the atmosphere. https://cdn.kastatic.org/ka-youtube-converted/z9xKxciHgo8.mp4/z9xKxciHgo8.mp4 270 Atmosphere and climate https://www.khanacademy.org/humanities/climate-project/x7467a46e12a31203:introduction-to-climate-change/x7467a46e12a31203:understanding-climate-change-1-1/a/video-what-is-climate-change 2025-04-10T02:24:39.181743146Z What Is Climate Change? We won the planetary lottery. But based on current trends, we have to wonder: Will our luck run out? article https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-and-society/x87d03b443efbea0a:earths-changing-climate/a/phet-simulation-article-exploring-climate-change 2026-02-27T18:10:31.250004438Z PhET simulation: Explore climate change Learn about the greenhouse effect and climate change using an interactive PhET simulation. article https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:explore-earth-and-space-science-through-simulations-ms-ess/x87d03b443efbea0a:explore-climate-change-through-simulations/e/phet-simulation-exploring-climate-change-ms-ess 2026-02-27T18:00:31.886851552Z PhET challenge: Climate change Use a PhET simulation to test your knowledge of climate change with this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise https://www.khanacademy.org/science/teacher-resources-ngss-science-domain/x2811526c37de0eab:hands-on-science-activities/x2811526c37de0eab:middle-school-earth-and-space-science-activities/a/activity-how-and-why-is-earth-s-climate-changing 2026-02-27T18:00:31.886851552Z Activity: How and why is Earth's climate changing? Make science come alive in your classroom with this free hands-on activity aligned to middle school standards. article https://www.khanacademy.org/humanities/oer-project-big-history/xc3079f0f2dd307e4:the-modern-age/xc3079f0f2dd307e4:anthropocene-6-6/a/article-climate-change 2025-08-13T00:49:52.439041008Z Climate Change You live in a world where evidence and news about climate change can be overwhelming. But there are things we can do to help the planet and ourselves. article https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:global-change/x0b0e430a38ebd23f:greenhouse-effect/v/greenhouse-effect-and-greenhouse-gases 2024-06-28T21:00:15.59562973Z Greenhouse effect and greenhouse gases The greenhouse effect, driven by gases like carbon dioxide, methane, and water vapor, is essential for maintaining Earth's habitable temperatures. However, excessive concentrations of these gases—particularly due to human activities—can lead to global warming and climate change. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/27e417aa-bb45-422d-bb99-7e0e28da1250_1280_720_base.png Greenhouse effect and greenhouse gases The greenhouse effect, driven by gases like carbon dioxide, methane, and water vapor, is essential for maintaining Earth's habitable temperatures. However, excessive concentrations of these gases—particularly due to human activities—can lead to global warming and climate change. https://cdn.kastatic.org/ka-youtube-converted/YpfxiDktSoI.mp4/YpfxiDktSoI.mp4 419 Atmosphere and climate https://www.khanacademy.org/humanities/climate-project/x7467a46e12a31203:the-impacts-of-climate-change/x7467a46e12a31203:evaluating-climate-impacts-2-1/a/activity-climate-change-impacts-around-the-world 2025-08-12T14:01:32.862782575Z Climate Change Impacts Around the World Explore stories from different regions to investigate the varied ways climate change impacts individuals and communities around the world. article https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:global-change/x0b0e430a38ebd23f:climate-change/v/climate-emergency-feedback-loops-permafrost 2023-05-01T21:01:15.296908287Z Climate emergency: feedback loops - permafrost Global warming is causing the thawing of permafrost, the icy expanse of frozen ground covering one-quarter of the Northern Hemisphere. As it melts, previously frozen carbon stored in plant and animal remains is released into the atmosphere as heat-trapping greenhouse gases, warming the climate further, and melting more permafrost in a dangerous feedback loop. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/332b4108-1d94-487f-a064-fd2d1341e6ed_1280_720_base.png Climate emergency: feedback loops - permafrost Global warming is causing the thawing of permafrost, the icy expanse of frozen ground covering one-quarter of the Northern Hemisphere. As it melts, previously frozen carbon stored in plant and animal remains is released into the atmosphere as heat-trapping greenhouse gases, warming the climate further, and melting more permafrost in a dangerous feedback loop. https://cdn.kastatic.org/ka-youtube-converted/e44IYZ-gQnE.mp4/e44IYZ-gQnE.mp4 655 Atmosphere and climate