What is global warming?, More rainfall, Less sunlight, Temperature increase, Sea cooling, What causes global warming?, Greenhouse gases, Earthquakes, Moon phases, Ocean tides, Which gas contributes to global warming?, Nitrogen, CO₂, Oxygen, Helium, Which human activity increases global warming?, Planting trees, Recycling paper, Saving water, Burning fuels, How does deforestation affect global warming?, Cools oceans, Adds rainfall, Stops storms, Less trees to absorb CO₂., What is one effect of global warming?, More glaciers, Sea level rise, Cooler summers, Lower tides, How can global warming affect crops?, Causes droughts, Adds nutrients, Speeds growth, Stops insects, What gases trap heat in the atmosphere?, Greenhouse gases, Mountain gases, Tree gases, Ocean gases, What is the greenhouse effect compared to?, A fan, A blanket, A freezer, A mirror, What would Earth be like without the greenhouse effect?, Too small, Too windy, Too bright, Too cold, Too much greenhouse effect traps too much what?, Snow, Rain, Heat, Soil, Too much greenhouse effect can lead to what?, Longer nights, Global warming, Less gravity, More moonlight, Melting ice can cause sea levels to ..., Rise, Fall, Spin, Freeze, What do fertilizers and pesticides sometimes pollute?, Planets and stars, Roads and bridges, Rivers and lakes, Books and desks, Which farm animal produces methane?, Horse, Cow, Chicken, Goat

Global Warming

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