题目内容
Brazil is the world’s second largest producer of ______.
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The Amazon is a moist broadleaf forest that covers most of the Amazon basin of _______.
A biofuel is a fuel that is produced through contemporary _______ processes, rather than a fuel produced by _______ processes.
Renewable fuels can include fuels that are ______ from renewable energy sources
Human activities since the beginning of the Industrial Revolution have produced a ______ increase in the atmospheric concentration of carbon dioxide.
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