AP Environmental Science Notes 6.7 - Biomass Energy

The video discusses biomass as an energy source, comparing it to biofuels like ethanol and biodiesel. It explains the environmental and health impacts of biomass burning, highlighting the differences between modern and fossil carbon. The video also covers the processes of biofuel production and the sustainability challenges associated with it, emphasizing the importance of sustainable agricultural practices.

What is biomass primarily used for in developing nations?

• Generating electricity

• Manufacturing goods

• Heating homes and cooking food

• Powering vehicles

Why is biomass not widely used for generating electricity?

• It produces too much pollution

• It is not renewable

• It is less energy dense and time-intensive to gather

• It is too expensive

What is the main difference between modern carbon and fossil carbon?

• Modern carbon does not release CO2 when burned

• Fossil carbon is renewable

• Modern carbon is more energy dense

• Modern carbon is from recently living organisms, while fossil carbon is from ancient organisms

Why is burning biomass considered carbon neutral?

• It does not release any carbon dioxide

• It uses advanced technology to capture carbon

• It absorbs more carbon dioxide than it releases

• It releases carbon dioxide that was recently absorbed by plants

What are some of the pollutants released by burning biomass?

• Carbon monoxide, NOx, particulate matter, and volatile organic compounds

• Sulfur dioxide, methane, and ozone

• Lead, mercury, and arsenic

• Chlorofluorocarbons and ammonia

What is a major health consequence of indoor biomass burning?

• Respiratory irritation and diseases

• Increased risk of heart disease

• Hearing loss

• Skin cancer

What is the primary source of biofuels like ethanol?

• Corn, sugarcane, and palm plants

• Coal

• Petroleum

• Natural gas

Why is ethanol considered renewable but not necessarily sustainable?

• It is not energy dense

• It requires a lot of water and fertilizers, which can degrade soil

• It cannot be mixed with gasoline

• It can be produced from non-renewable resources

What is a potential benefit of using algae for biofuel production?

• It can be grown in any climate

• It does not need sunlight

• It requires less water than corn

• It produces more greenhouse gases

Why does palm biodiesel produce more greenhouse gases compared to fossil fuels?

• It is mixed with gasoline

• It is less energy dense

• It requires clearing tropical forests, which releases stored carbon

• It uses more water