https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/v/human-activities-adding-toxic-substances-to-environment 2026-06-07T21:40:43.833474432Z Human activities adding toxic substances to environment Human activities adding toxic substances to environment Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Human activities adding toxic substances to environment Human activities adding toxic substances to environment https://cdn.kastatic.org/ka-youtube-converted/e86rPa6JkwM.mp4/e86rPa6JkwM.mp4 181 Pollution and its impact on the environment https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/v/air-pollution-causes-and-effects 2026-06-07T21:40:43.833474432Z Air Pollution: causes and effects Air Pollution: causes and effects Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Air Pollution: causes and effects Air Pollution: causes and effects https://cdn.kastatic.org/ka-youtube-converted/LFPhzMFrpf0.mp4/LFPhzMFrpf0.mp4 163 Pollution and its impact on the environment https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/e/pollution-basic 2026-06-07T21:40:43.833474432Z Air Pollution - Basic This exercise includes question regarding different types of pollutions, their causes and effects. Asma rouf exercise https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/e/air-pollution-and-its-causes 2025-03-06T07:58:34.281182753Z Air pollution and its causes Let's understand what air pollution and what various factors contribute to it. Revathi exercise https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/v/water-pollution-causes-and-effects 2026-06-07T21:40:43.833474432Z Water Pollution: causes and effects Water Pollution: causes and effects Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Water Pollution: causes and effects Water Pollution: causes and effects https://cdn.kastatic.org/ka-youtube-converted/QnPqVw5cuzo.mp4/QnPqVw5cuzo.mp4 165 Pollution and its impact on the environment https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/e/understanding-water-pollution 2026-06-07T21:40:43.833474432Z Understanding Water Pollution This exercise includes questions on water pollution, its sources and effects. Asma Rouf exercise https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/v/land-pollution-causes-and-effects 2026-06-07T21:40:43.833474432Z Land Pollution: Causes and Effects Land Pollution: Causes and Effects Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Land Pollution: Causes and Effects Land Pollution: Causes and Effects https://cdn.kastatic.org/ka-youtube-converted/oA59db83gks.mp4/oA59db83gks.mp4 170 Pollution and its impact on the environment https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/e/land-pollution-soil-pollution 2026-06-07T21:40:43.833474432Z Land pollution (Soil Pollution) This exercise includes questions regarding soil pollution. Asma Rouf exercise https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/v/effects-of-burning-fossil-fuels 2026-06-07T21:40:43.833474432Z Effects of burning fossil fuels Effects of burning fossil fuels Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Effects of burning fossil fuels Effects of burning fossil fuels https://cdn.kastatic.org/ka-youtube-converted/Arlh_soEHaI.mp4/Arlh_soEHaI.mp4 183 Pollution and its impact on the environment https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/v/biodegradable-vs-non-biodegradable-materials 2026-06-07T21:40:43.833474432Z Biodegradable vs non- biodegradable materials Biodegradable vs non- biodegradable materials Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Biodegradable vs non- biodegradable materials Biodegradable vs non- biodegradable materials https://cdn.kastatic.org/ka-youtube-converted/I6L2GcGalf4.mp4/I6L2GcGalf4.mp4 164 Pollution and its impact on the environment https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/v/plastics-and-environment-pk 2025-12-18T18:40:53.641757593Z Plastics and environment Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Plastics and environment Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/ZAAzbw_ei9Q.mp4/ZAAzbw_ei9Q.mp4 358 Pollution and its impact on the environment https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/e/plastic-and-environment 2026-04-10T11:50:42.031414522Z Plastic and environment Lets answer some questions Shankar R exercise https://www.khanacademy.org/science/grade-5-science-pakistan-national-curriculum/x5132c0690d5e9b7d:ecosystem/x5132c0690d5e9b7d:pollution-and-its-impact-on-the-environment/e/impact-of-pollution-on-environment 2026-06-07T21:40:43.833474432Z Impact of Pollution on Environment Impact of Pollution on Environment Asma Rouf exercise