Which option correctly answers: what is a carbon footprint?

✅ B. Ozone layer

a: Troposphere only | b: Ozone layer | c: Inner core | d: Mantle Read more

✅ C. Joule

✅ D. 300,000 km/s

a: 30,000 km/s | b: 3,000 km/s | c: 3,000,000 km/s | d: 300,000 km/s Read more

✅ A. ozone depletion

✅ A. Thermometer

A thermometer measures temperature. Read more

✅ C. Carbon dioxide

a: Hydrogen | b: Nitrogen | c: Carbon dioxide | d: Oxygen Read more

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✅ D. Red blood cells

a: Plasma proteins | b: Platelets | c: White blood cells | d: Red blood cells Read more