Greenhouse effect - It happens when some of the gases in the atmosphere trap heat from the Sun., Carbon footprint - The amount of CO2 we release in the atmosphere., Biodiversity - The variety of plant and animal life in the world or in a particular habitat. , Global warming - The gradual rise in the Earth's temperature caused by extra greenhouse gases. , Coal - oil - natural gas - Fossil fuels., Deforestation - The cutting down of forests. , Human activities - They increase greenhouse gases., Flood - An overflow of water that submerges normally dry land., Drought - When there is a shortage of rain over a long period of time., Forest fires - Large, uncontrolled fires in the woods., Coral bleaching - Corals lose their colors and turn white., Wind turbines - They turn wind energy into electricity., Sea level rise - an increase in the level of the world's oceans due to the effects of global warming, Ocean acidification - a change in the properties of ocean water that can be harmful for plants and animals.,

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