Climate Change and Environmental Concepts

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Climate Change

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Long-term changes in temperature, precipitation, and other atmospheric conditions on Earth. Example: Rising temperatures, more frequent heat waves, and intense storms are all examples of climate change impacts that have been observed globally over recent decades.

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Global Warming

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The gradual increase in the Earth's average surface temperature due to human activities, especially the burning of fossil fuels. Example: The Earth's average temperature has increased by approximately 1.2°C since the late 19th century, primarily due to human activities such as burning fossil fuels.

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Greenhouse Effect

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The trapping of heat in Earth's atmosphere by gases such as carbon dioxide (CO₂), methane (CH₄), and water vapor. It keeps the planet warm enough to support life. Example: When sunlight reaches Earth, it is absorbed and then re-radiated as heat. Greenhouse gases in the atmosphere trap this heat, preventing it from escaping into space, which keeps the Earth warm enough to sustain life.

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Greenhouse Gases

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Gases in the atmosphere that trap heat. Major greenhouse gases include carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), and water vapor (H₂O). Example: Carbon dioxide (CO₂) released from burning coal for electricity generation and methane (CH₄) emitted by livestock are both greenhouse gases that contribute to global warming.

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Carbon Footprint

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The amount of carbon dioxide and other greenhouse gases emitted by human activities, often measured in terms of energy use, transportation, and food production. Example: Driving a car that runs on gasoline, using electricity from coal-powered plants, and eating food that has been transported long distances all contribute to an individual's carbon footprint.

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Fossil Fuels

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Natural resources like coal, oil, and natural gas that are burned for energy and contribute to greenhouse gas emissions. Example: Oil, coal, and natural gas are all fossil fuels. They are burned for energy, such as gasoline in cars, heating homes, or generating electricity, releasing CO₂ into the atmosphere.

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Deforestation

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The clearing of forests for agriculture, urbanization, or other human activities, which reduces the Earth’s ability to absorb CO₂ and harms biodiversity. Example: In Brazil, large areas of the Amazon rainforest are cleared to make way for cattle ranching and agriculture. This reduces the Earth's ability to absorb carbon dioxide, a key greenhouse gas.

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Renewable Energy

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Energy from natural sources that can be replenished, such as solar, wind, hydroelectric, and geothermal power. Example: Solar panels on rooftops, wind turbines, and hydroelectric dams are all examples of renewable energy sources that generate power without emitting greenhouse gases.

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Sustainability

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Using resources in a way that meets current needs without compromising the ability of future generations to meet their own needs. Example: A farm that uses crop rotation, organic fertilizers, and water conservation techniques to maintain soil health and reduce environmental impact is practicing sustainability.

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Ecosystem

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A community of living organisms interacting with their physical environment. Climate change can disrupt ecosystems by affecting species' habitats. Example: A coral reef is an ecosystem where marine life, such as fish, coral, and algae, interact with each other and their environment. Climate change is causing coral bleaching, threatening the balance of this ecosystem.