Practice check: Choose the correct environmental science answer: which gas is a major component of the natural greenhouse effect and also rises due to human activities?

✅ A. Ozone layer

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

✅ D. Carbon dioxide

a: Neon | b: Argon | c: Helium | d: Carbon dioxide Read more

✅ B. Using efficient appliances and switching off unused devices

a: Blocking ventilation filters | b: Using efficient appliances and switching off unused devices | c: Opening a refrigerator door for long periods | d: Leaving every light on Read more

✅ C. 56 ft

✅ B. H2O

a: NaCl | b: H2O | c: CO2 | d: O2 Read more

✅ B. Establishing forest on land not recently forested

a: Draining wetlands | b: Establishing forest on land not recently forested | c: Building roads | d: Removing trees Read more

✅ B. Total greenhouse-gas emissions associated with an activity or entity

a: A shoe mark in soil | b: Total greenhouse-gas emissions associated with an activity or entity | c: A tree's height | d: The weight of coal only Read more

✅ B. 4.5 to 6.2 million