https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-3/x04828215b460a495:biodiversity-and-its-conservation/v/deforestation 2025-05-31T15:37:50.008656366Z Deforestation Why is deforestation a big problem? In this video, we explore what deforestation means, why forests are cut down, and how it affects our planet. From building houses to farming, we look at the main causes of cutting trees. We also explain the harmful effects: Rise in temperature and pollution Increase in carbon dioxide leading to global warming Reduced rainfall and more chances of floods Soil erosion and loss of fertility, causing desertification Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Deforestation Why is deforestation a big problem? In this video, we explore what deforestation means, why forests are cut down, and how it affects our planet. From building houses to farming, we look at the main causes of cutting trees. We also explain the harmful effects: Rise in temperature and pollution Increase in carbon dioxide leading to global warming Reduced rainfall and more chances of floods Soil erosion and loss of fertility, causing desertification https://cdn.kastatic.org/ka-youtube-converted/P05gJ_KbPBs.mp4/P05gJ_KbPBs.mp4 187 Deforestation https://www.khanacademy.org/science/ap-biology/ecology-ap/disruptions-to-ecosystems/v/human-activities-that-threaten-biodiversity 2024-05-06T19:22:43.24334365Z Human activities that threaten biodiversity Biodiversity is threatened by human population growth and resource utilization, leading to decreased species richness. Local factors contributing to biodiversity loss include land-use changes, pollution, resource exploitation, and introduction of exotic species. Balancing human needs with ecosystem health requires doing more with less and preserving species richness for a sustainable future. California Academy of Sciences video https://cdn.kastatic.org/googleusercontent/lIwFyjJR3YjUIMdXu-SqvzHvpWcBxkgWTdk3ak7DkceypH3Lo6QrlIREWwRfs9yyLfJu6m7JtI_3jthsDjlFcoGx Human activities that threaten biodiversity Biodiversity is threatened by human population growth and resource utilization, leading to decreased species richness. Local factors contributing to biodiversity loss include land-use changes, pollution, resource exploitation, and introduction of exotic species. Balancing human needs with ecosystem health requires doing more with less and preserving species richness for a sustainable future. https://cdn.kastatic.org/ka-youtube-converted/2RC3Hsk90t8.mp4/2RC3Hsk90t8.mp4 771 Deforestation https://www.khanacademy.org/science/kn-class-7-science/x2edacdad2354c760:forests-our-lifeline/x2edacdad2354c760:deforestation/e/what-if-forests-disappear 2026-04-07T23:55:07.30621384Z What If Forests Disappear? Explore how deforestation affects our environment — from floods and habitat loss to climate change — and understand why forests are vital for balancing life on Earth. Yajurva Joshi exercise https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-3/x04828215b460a495:biodiversity-and-its-conservation/v/protecting-nature 2025-07-08T13:00:03.212778306Z Protecting Nature Protecting nature is essential for the survival of all living beings on Earth. Forests, rivers, animals, and even tiny insects play a role in maintaining balance in our ecosystems. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Protecting Nature Protecting nature is essential for the survival of all living beings on Earth. Forests, rivers, animals, and even tiny insects play a role in maintaining balance in our ecosystems. https://cdn.kastatic.org/ka-youtube-converted/0D9RcmjEfak.mp4/0D9RcmjEfak.mp4 287 Deforestation