Climate Change Environmental Science Fundamentals 3

Question 1

How does deforestation in tropical regions contribute to climate change beyond simply removing carbon-absorbing trees?

Accepted Answer

Burning cleared vegetation releases stored carbon and reduces regional rainfall patterns

Answer

It increases ocean salinity levels

Answer

It causes the jet stream to shift northward

Answer

It increases methane production from soils

Question 2

Which metric best describes a country's total contribution to atmospheric warming over time, accounting for historical emissions?

Accepted Answer

Cumulative greenhouse gas emissions

Answer

Current annual CO₂ emissions rate

Answer

GDP-adjusted emissions intensity

Answer

Per capita daily energy consumption

Question 3

What is 'blue carbon' in the context of climate mitigation?

Accepted Answer

Carbon stored in coastal and marine ecosystems like mangroves, seagrasses, and salt marshes

Answer

Carbon captured and stored by oceanic plankton in the deep sea

Answer

The carbon dissolved as carbonate ions in ocean water

Answer

Liquid CO₂ injected into deep ocean sediments

Question 4

Why is the Arctic warming approximately four times faster than the global average?

Accepted Answer

The ice-albedo feedback loop amplifies warming as reflective ice is replaced by dark ocean

Answer

Arctic air masses contain more water vapor

Answer

Ozone depletion over the poles allows more UV radiation in

Answer

Methane from tundra creates localized warming only in the Arctic

Question 5

What does 'net-zero emissions' mean in climate policy?

Accepted Answer

The amount of greenhouse gases emitted is balanced by the amount removed from the atmosphere

Answer

A country stops all industrial greenhouse gas production

Answer

A company uses 100% renewable energy for its operations

Answer

Total global emissions are equal across all nations

Question 6

How do aerosols from volcanic eruptions affect short-term global temperature?

Accepted Answer

They reflect incoming solar radiation, causing temporary cooling

Answer

They trap outgoing infrared radiation, causing temporary warming

Answer

They react with methane to produce additional CO₂

Answer

They seed cloud formation that increases precipitation globally

Question 7

Which agricultural practice is considered a significant source of methane emissions contributing to climate change?

Accepted Answer

Flooded rice paddies and livestock digestion

Answer

Drip irrigation in arid regions

Answer

No-till farming on croplands

Answer

Controlled burning of crop residues