Ch 17. EVR

Front

What are chlorofluorocarbons (CFCs)?

Back

Chlorofluorocarbons (CFCs) are man-made compounds used in refrigeration, air conditioning, and aerosol propellants. They are known to deplete the ozone layer and have been largely phased out due to international agreements.

Front

What is the primary cause of deforestation contributing to carbon dioxide emissions?

Back

Deforestation primarily occurs due to agricultural expansion, logging, and urbanization, leading to the release of stored carbon dioxide in trees into the atmosphere.

Front

What is the most effective way to prevent significant climate change?

Back

Reducing fossil fuel use is considered the most effective way to prevent significant climate change, as it directly addresses the primary source of greenhouse gas emissions.

Front

How does a warming climate affect the hydrologic cycle?

Back

A warming climate affects the hydrologic cycle by causing earlier snowmelt, which can disrupt water availability and timing for ecosystems and human use.

Front

What is the relationship between atmospheric carbon dioxide and ocean pH?

Back

Increased atmospheric carbon dioxide leads to higher levels of carbonic acid in the oceans, resulting in lower pH and ocean acidification.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the process by which certain gases in Earth's atmosphere trap heat, preventing it from escaping into space and thereby warming the planet.

Front

What role do methane emissions play in climate change?

Back

Methane is a potent greenhouse gas that is significantly more effective than carbon dioxide at trapping heat in the atmosphere, contributing to global warming.

Front

What are the main sources of carbon dioxide emissions?

Back

The main sources of carbon dioxide emissions include burning fossil fuels for energy, deforestation, and certain industrial processes.

Front

What is the significance of the hydrologic cycle?

Back

The hydrologic cycle is crucial for distributing water across the planet, supporting ecosystems, agriculture, and human consumption.

Front

How does urbanization contribute to climate change?

Back

Urbanization contributes to climate change through increased energy consumption, transportation emissions, and land-use changes that reduce natural carbon sinks.