Rainforests often have many plants and animals, so they have high ________., biodiversity, pests, carbon emissions, When the Earth’s temperature increases, we call it ________., extinction, global warming, ancient, ________ is when people cut down trees for farming or building., land clearing, air quality, endangered species, Cats, foxes, and rabbits that live in the wild are ________., pests, feral animals, natural resources, This year, many areas in Vietnam were damaged by ________., animal species, climate change, natural disasters, Water, wood, and minerals are examples of ________., air quality, natural resources, carbon emissions, Endangered species are plants and animal that are in danger of ________., sustain, biodiversity, extinction, Mosquitoes are ________ because they bring illness to people., pests, animal species, endangered species, Climate change is creating ________ in many places in Vietnam., animal species, extreme weather events, natural resources, Many scientists say that ________ is creating hotter summers and stronger storms., endangered species, climate change, feral animals, The pyramids are very old. They are ________ buildings., ancient, extreme, natural, When car engines burn fuel, they create ________ that pollute the air., carbon emissions, biodiversity, land clearing, In cities like Hanoi, the ________ isn't very good because of air pollution., extinction, pests, air quality, We must ________ our forests so people can enjoy them for many years., clear, discover, sustain, Pandas are an ________ because there are not many of them on Earth., ancient, endangered species, natural disaster, A tiger and a lion are different ________, but both are big cats., natural resources, pests, animal species.

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