Theconsumptionofaliter heating oil by a family willemit_____kgCO₂.
A. 1.0
B. 2.0
C. 3.0
D. 4.0
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In the medium and long term, a world-wide average emission of maximum ____ tons of CO₂ per person per year must be targeted. This amount is nowadays considered to be the maximum allowed quantity for a sustainable living on earth.
A. 1
B. 2
C. 3
D. 5
According to the IPCC, around __________% of flora and fauna species evaluated during climate change studies are at risk of extinction. As a matter of fact, more than a million species could face extinction.
A. 10-15
B. 15-25
C. 20-30
D. 30-50
___________ is external conditions or surroundings, especially those in which people, animals, and plants live.
A. The earth
B. Environment
C. The sea
D. The ocean
___________ is the study of the relationships between plants, animals, people, and their environment, and the balances between these relationships; it is the study of how organisms interact with their environment, including biological factors or conditions, such as other organisms, as well as nonbiological ones, such as water, air, soil, and solar radiation.
A. Geography
B. Economics
C. Ecology
D. Biology