the greenhouse effect - the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface, deforestation - the action of clearing a wide area of trees, hydro-electricity - electricity produced from generators driven by turbines that convert the potential energy of falling or fast-flowing water..., global warming - the phenomenon of increasing average air temperatures near the surface of Earth over the past one to two centuries, solar panel - a panel designed to absorb the sun's rays as a source of energy for generating electricity or heating, wind turbines - a turbine having a large vaned wheel rotated by the wind to generate electricity., carbon emissions - carbon dioxide that planes, cars, factories, etc. produce, thought to be harmful to the environment, carbon dioxide - a gas that is produced when we burn things, fossil fuels - gas, oil and coal are examples of these., ice cap - area of land on earth that is covered with ice, rising sea-level - increase in the height of the sea due to melting ice caps., carbon footprint - the amount of carbon dioxide a person's activities produce., off-the-grid - disconnected from an electricity supply, sustainable living - using renewable energies without creating waste, Earth Hour - one hour, every year when people worldwide turn off electric appliances,

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