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biomass energy思维导图

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Fundamental question(Para1)

what is biomass energy and what does the research say about it?

Definition of biomass energy(part 2)

Biomass is any organic, decomposable matter

Generation of biomass energy(part 2)

wood and agricultural products such as logs, sawdust, and agricultural waste;

solid waste (i.e.garbage);

landfill gas (i.e. methane);

liquid fuels such as biodiesel and ethanol,which are produced from crops such as wheat, corn, sugar beet, and sugar cane.

conclusion

Biomass is generally considered as renewable energy

Introduce the technology of biomass-fired power(Para3)

put forward opinions

the production process of biomass-fired power is in essence not dissimilar to that of a traditional coal-fired power

give examples

illuminate the process of biomass-fired power

typical biomass used: wood chips or pellets, methane

conclusion

the technology is so simple that the number of biomass power plants grows significantly

author’s attitude(However): can’t underestimate the adverse environmental impact

Argue that whether biomass is a carbon-neutral source of energy(Para4)

proponents of bioenergy claim that it is

introduce photosynthesis

give the reason: when biomass is burned, the amount of CO2 released into the atmosphere is equal to the amount captured during photosynthesis

author claim that it is not(However)

reasons one: it can take centuries to reestablish the forests and pay off the carbon debt.

reason two: harvesting and transporting biomass over great distances generates hazardous air pollutants

conclusion

it is highly doubtful that biomass can ever be classed as truly carbon-neutral

子主题 1

The negative impact of large planting of energy crops(part 5)

Author's point of view

Because a large number of energy crops will lead to environmental problems and the reduction of food crops.

Give examples

the European Institute of Environmental Policy (2012) predicted that food prices would rise because of the decrease in the proportion of food crops.

The author's attitude towards biomass: criticism(part 6)

Biomass is a sustainable alternative to fossil fuels

子主题 1

Biomass energy has a potentially disastrous impact on the environment and the poor.

Give examples

the failure to consider the emission of harmful pollutants in the production process and the fact that food sources are less used to meet the food demand of the rapidly growing global population have led to the loss of land on which many small farmers depend for survival.

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