18 The Environment and Us | 5th EVS 1 chapter 18 lesson 18 questions Answers Maharashtra State Board скачать в хорошем качестве

18 The Environment and Us | 5th EVS 1 chapter 18 lesson 18 questions Answers Maharashtra State Board

18 The Environment and Us | 5th EVS 1 chapter 18 lesson 18 questions Answers Maharashtra State Board 0:00 Introduction 0:38 Water hyacinth are formed in rivers and lakes due to pollution. 1:12 To control the water hyacinth should we remove and wastewater from households or washing clothes inverter should be banned. 2:27 region the number of birds, amphibians, small mammals and earthworms would increase. 4:21 Birds lay eggs. 4:39 After three-four weeks they become an adult bird and start laying eggs. 5:41 Industries let out some poisonous gases into the air. 6:19 obtained by clearing forests? We use land for agriculture, housing, industry and for building roads and railways by clearing forest. 7:10 of the environment. 1 Due to human intervention in nature the non living components are getting polluted. 8:16 If one factor of the environment Ini is damaged, it disturbs environmental balance. 9:00 This will be a threat to the whole living world. 10:37 If the plants on the earth are destroyed the number of animals also fall day by day. 11:05 Because of hunting, the population of wild animals is falling 13:18 Manmade - book, pen