Renewable Energy and the Future of Power
Estimated Level: A1 Based on CEFR distribution
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CEFR B1 Words (14)
coal
B1
constantly
B1
dioxide
B1
ecosystems
B1
Lemma: ecosystem
efficient
B1
electricity
B1
essential
B1
generate
B1
organization
B1
protect
B1
relatively
B1
reliable
B1
rely
B1