九年级英语上册课unit7的重点单词1. InventionDefinition: A new device, process, or method created by human effort. Example: The invention of the telephone revolutionized communication.2. RevolutionizeDefinition: To completely change something in a positive way.Example: The Internet has revolutionized the way we access information.3. InventorDefinition: A person who creates or develops new ideas, devices, or methods. Example: Thomas Edison is known as a great inventor for inventing the light bulb.4. DiscoverDefinition: To find or uncover something previously unknown or hidden. Example: Columbus discovered America in 1492.5. ExplorationDefinition: The act of traveling to unfamiliar places in order to learn more about them.Example: Astronauts go on space exploration to discover new planets.6. EnvironmentalistDefinition: A person who advocates for the protection and preservation of the natural environment.Example: Jane Goodall is a well-known environmentalist who has worked to protect chimpanzees and their habitats.7. PollutionDefinition: The presence of harmful substances in the environment, often caused by human activities.Example: Air pollution is a major issue in many cities due to vehicle emissions.8. RecycleDefinition: To convert waste into reusable materials.Example: It's important to recycle paper, plastic, and glass to reduce waste.9. RenewableDefinition: Able to be replenished or replaced naturally over time.Example: Solar and wind energy are examples of renewable energy sources.10. EfficientDefinition: Achieving maximum productivity with minimum wasted effort or expense.Example: LED light bulbs are more efficient and use less energy thantraditional incandescent bulbs.11. Pollution-freeDefinition: Not causing pollution or not being affected by pollution. Example: Electric cars are considered pollution-free vehicles because they do not emit harmful gases.12. RobotDefinition: A machine capable of carrying out complex actions automatically. Example: Robots are commonly used in factories to perform repetitive tasks.13. Virtual RealityDefinition: A computer-generated environment that simulates a realistic experience.Example: Virtual reality headsets allow users to immerse themselves in a virtual world.14. Artificial Intelligence (AI)Definition: The theory and development of computer systems capable of performing tasks that normally require human intelligence.Example: Siri and Alexa are examples of AI-powered software that can interact with users.15. Genetic EngineeringDefinition: The manipulation of an organism's genetic material to achieve desirable traits.Example: Genetic engineering has allowed scientists to create crops with improved resistance to pests.16. Global WarmingDefinition: The long-term increase in Earth's average temperature due to human activities.Example: Some scientists believe that global warming is causing the polar icecaps to melt.17. SustainableDefinition: Able to be maintained at a certain rate or level without depleting resources.Example: Using renewable energy sources instead of fossil fuels is more sustainable for the environment.18. PopulationDefinition: The total number of people living in a particular area.Example: China has the largest population in the world.19. OverpopulationDefinition: The condition where the number of people in an area exceeds the capacity of the environment to support them at a decent standard of living. Example: Overpopulation can lead to food shortages and overcrowding in cities.20. PredictionDefinition: A statement about what will happen or might happen in the future. Example: Weather forecasts are predictions about the expected weather conditions.21. InnovationDefinition: The introduction of something new or the improvement of anexisting product, idea, or technology.Example: The smartphone was a major innovation that changed the way we communicate and access information.22. EmissionDefinition: The release of gases, particles, or radiation into the atmosphere. Example: Factories and vehicles are major sources of carbon emissions, which contribute to climate change.23. ConservationDefinition: The act of protecting and preserving natural resources and wildlife.Example: National parks and nature reserves are established to conserve endangered species and their habitats.24. SustainabilityDefinition: The ability to maintain balance and harmony between humanactivities and the natural environment.Example: Sustainable farming practices help protect the soil and water resources for future generations.25. Alternative EnergyDefinition: Energy derived from renewable sources such as sunlight, wind, water, and biomass.Example: Solar panels and wind turbines are examples of alternative energy technologies.26. Carbon FootprintDefinition: The total amount of greenhouse gases, especially carbon dioxide, emitted by an individual, organization, or country.Example: Individuals can reduce their carbon footprint by using public transportation instead of driving.27. DeforestationDefinition: The clearing or cutting down of trees in a forest, usually to make way for agriculture or urban development.Example: Deforestation has a negative impact on the environment, including loss of biodiversity and increased carbon dioxide levels.28. WildlifeDefinition: Animals and plants that live in natural habitats, especially those not domesticallyated or cultivated.Example: The Amazon rainforest is home to a rich diversity of wildlife, including jaguars, monkeys, and exotic birds.29. Endangered SpeciesDefinition: A species at risk of extinction because of environmental pressures or human activities.Example: The giant panda is an endangered species due to habitat loss and poaching.30. Eco-friendlyDefinition: Not harmful to the environment.Example: Using reusable bags and water bottles instead of disposable ones is an eco-friendly choice.31. Green TechnologyDefinition: Technology that is designed to minimize environmental impact and promote sustainable practices.Example: Electric cars and hybrid vehicles are examples of green technology in transportation.32. Waste ManagementDefinition: The collection, transportation, processing, and disposal of waste materials.Example: Proper waste management is important to prevent pollution and protect public health.33. Climate ChangeDefinition: Long-term shifts in weather patterns and global temperatures, usually caused by human activities.Example: Rising sea levels and more frequent extreme weather events areeffects of climate change.34. BiodiversityDefinition: The variety of plant and animal life in the world or in aparticular habitat.Example: Coral reefs are known for their high biodiversity, hosting a wide range of marine species.35. Habitat DestructionDefinition: The process of destroying or altering a natural habitat in a way that makes it unsuitable for the original species.Example: Habitat destruction due to urbanization is a major threat to many wildlife species.36. Eco-systemDefinition: A community of living organisms and their interactions with the environment.Example: A healthy ecosystem supports a balanced and diverse range of species.37. Carbon NeutralDefinition: Achieving a balance between carbon emissions and carbon absorption, resulting in a net zero carbon footprint.Example: Some companies aim to become carbon neutral by offsetting their emissions through tree planting or investing in renewable energy projects.38. Environmental ImpactDefinition: The effect that human activities have on the natural environment. Example: Constructing a new highway can have a significant environmental impact, including noise pollution and habitat destruction.39. Circular EconomyDefinition: An economic system aimed at eliminating waste and the continualuse of resources.Example: In a circular economy, products are designed to be repaired, reused, or recycled, rather than thrown away.40. Fossil FuelsDefinition: Fuels such as coal, oil, and natural gas, formed from the remains of ancient plants and animals.Example: Burning fossil fuels for energy is a major contributor to airpollution and climate change.。
