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UNIDAD 3: 1

Across
Pollution
Natural resource
To improve
To appreciate
Clean air
Greenhouse effect
Environment
Drought
Flood
To replace
To fly
Down
Deforestation
Responsibility
Garbage container
To vote
Transformation
Ozone layer
Biodiversity
Innovation
Nonrenewable
To protect
To extinguish
To decrease
To threaten
To harm