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100

The total amount of greenhouse gases, especially carbon dioxide, released into the atmosphere by human activities (like driving, manufacturing, or using electricity).

Carbon footprint – 碳足迹

100

The release of gases (like CO₂ or methane) into the air, often from cars, factories, or power plants.

Emissions – 排放

200

Energy that comes from sources that do not run out and do not harm the environment, such as solar, wind, hydro, or geothermal power.

Sustainable energy – 可持续能源

300

The layer of gases surrounding Earth, which includes the air we breathe and plays a key role in regulating climate and temperature.

Atmosphere – 大气层

300

A unit of measurement (1 ton = 1,000 kilograms) used to describe the amount of carbon dioxide or other emissions.

Ton – 吨

400

Materials used in buildings to keep heat in during the winter and out during the summer, reducing the need for energy and cutting emissions.

Insulation – 保温

400

A powerful greenhouse gas that is produced by natural sources (like wetlands) and human activities (like livestock farming and fossil fuel use).

Methane – 甲烷

500

Gases like carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) that trap heat in the Earth’s atmosphere, causing the planet to warm up.

Greenhouse gases – 温室气体