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Ecology includes the study of how animals relate to their ___________.
The __________ cuts will affect everyone.
______ is collected from the sun.
Air _________ is bad in many cities.
The building ________ were eco-friendly.
______ warming constitutes towards climate change.
Biofuel is a _________ fuel produced by living organisms.
The country's vast oil fields are their best ________.
Consumers need to think about buying 'green'products.
Environmental issues can impact on the _______.
Global warming constitutes towards _______ change.
The ______ impact of not recycling can be damaging to the planet.
I own several __________ across Europe.
Don't _____ your money on that ride.