pollution

• What is a visible consequence of plastic pollution in oceans?

  Images of hot plastic
• What is the main topic of today's lesson?

  The pollution caused by waste
• When did the human population first pass 1 billion?

  In the early 1800s
• How has the human population changed in the last 200 years?

  It has increased to over 7 billion
• What does the United Nations predict for the population by 2050?

  Nearly 10 billion people
• What is the relationship between standard of living and resource use?

  Higher standard of living increases resource use
• What happens if waste is not handled properly?

  It can cause serious pollution
• How does pollution affect biodiversity?

  It kills animals and plants
• What are the three types of pollution to know?

  • Land pollution
  • Air pollution
  • Water pollution
• What is one consequence of landfill sites?

  They destroy natural habitats
• What can household waste spread into the soil?

  Toxic chemicals
• How do pesticides and herbicides affect food chains?

  They can accumulate in food chains
• What happens to top predators when toxic chemicals accumulate?

  They can end up poisoned
• What is the second type of pollution mentioned?

  Air pollution
• What do tiny solid particles from burning materials do?

  They can damage lungs when inhaled
• What gases are formed when fossil fuels are burned?

  Acidic gases like sulfur dioxide
• What is acid rain formed from?

  Acidic gases dissolving in rainwater
• What is the impact of acid rain on ecosystems?

  It can kill animals and plants
• What is the third type of pollution discussed?

  Water pollution
• What substances contribute to water pollution?

  Pesticides, herbicides, and fertilizers
• What happens when nitrates wash into water?

  They cause rapid algae growth
• What occurs after algae die in water bodies?

  Microorganisms break them down using oxygen
• What is the consequence of low oxygen levels in water?

  Aquatic organisms like fish die
• What mnemonic can help remember the types of pollution?

  • Law: Land, Air, Water
• What is suggested to protect the environment from pollution?

  We need more laws
• What will happen if biodiversity continues to drop?

  It will lead to more environmental issues
• What are two reasons for increased waste production?

  Increasing population and standard of living
• What is the mechanism by which waste impacts biodiversity?

  Waste produces pollution that kills organisms
• Name one example of air pollution.

  Smoke
• Name two specific gases that contribute to air pollution.

  Sulfur dioxide and nitrogen oxides
• What are the impacts of pollution on biodiversity?

  • Kills animals and plants
  • Reduces biodiversity
  • Disrupts ecosystems