Practice Test Geeks(CES) Certified Environmental Scientist Practice Test
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CES Climate Change & Greenhouse Gas Management Flashcards

6 cards from real CES practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 CES Climate Change & Greenhouse Gas Management flashcards as text

  1. Which natural carbon sink currently absorbs approximately 25–30% of anthropogenic CO2 emissions annually?

    Answer: Oceans

    The world's oceans absorb roughly 25–30% of anthropogenic CO2 annually through physical dissolution and biological processes, making them the largest active carbon sink.

  2. What is the primary driver of permafrost thaw feedback in Arctic regions?

    Answer: Rising temperatures releasing methane and CO2 from previously frozen organic matter

    As Arctic temperatures rise, frozen organic matter in permafrost thaws and decomposes, releasing stored methane and CO2 in a positive feedback loop that amplifies warming.

  3. Which metric, expressed in years, describes how long a greenhouse gas remains active in the atmosphere after being emitted?

    Answer: Residence time

    Atmospheric residence time (or lifetime) describes how long a GHG molecule remains in the atmosphere, which directly influences its cumulative warming effect.

  4. A company wants to claim 'carbon neutrality.' Which combination of actions is required?

    Answer: Measuring all material emissions, reducing them as much as feasible, and offsetting remaining emissions

    Carbon neutrality requires a complete GHG inventory, maximum feasible emission reductions, and high-quality offsets to neutralize any remaining emissions.

  5. Which EPA program allows facilities to earn and trade credits for reducing GHG emissions voluntarily before mandatory regulations take effect?

    Answer: EPA Climate Leaders Program (historical)

    The EPA Climate Leaders Program (active 2002–2011) was a voluntary partnership allowing large companies to set GHG reduction goals and earn recognition for early action.

  6. What does a 'carbon budget' represent in climate policy discussions?

    Answer: The cumulative amount of CO2 that can be emitted globally while staying below a specific temperature target

    A carbon budget defines the maximum cumulative CO2 emissions allowable to limit warming to a given temperature threshold (e.g., 1.5°C), providing a science-based constraint for climate policy.