Human Impact on Energy Resources
What Can I Do at Home to Be More Energy Efficient?
Focus on strategies that reduce energy consumption in residential settings.
Global Use of Energy Resources
Petroleum is identified as the most widely used energy resource in the United States.
Followed closely by coal and natural gas.
In developing countries, approximately 25% of energy consumption derives from renewable resources.
In industrialized countries, the share of energy from renewable resources is significantly lower at about 10%.
Energy Conservation Strategies
Utilizing locally available renewable energy resources can significantly conserve fuels.
Employing a variety of energy resources rather than relying solely on a single, nonrenewable source aids in the conservation of overall energy resources.
Energy Efficiency
Energy is defined as the ability to do work.
The ratio of work produced to the energy consumed is termed energy efficiency.
It is critical to note that no energy source can achieve 100% efficiency.
In the U.S., the majority of electricity generation is dependent on burning fossil fuels.
Approximately 1/3 of the energy contained within these fossil fuels is converted into usable electrical energy.
Harnessing Waste Thermal Energy
The process of generating two usable forms of energy simultaneously is referred to as cogeneration.
It is noteworthy that industries consume 1/3 of all energy produced in the U.S.
The implementation of cogeneration has enabled some sectors to boost production while simultaneously reducing energy usage.
Sustainable Energy
The concept of sustainable energy pertains to the worldwide management of Earth’s natural resources.
This strategy aims to fulfill both present and future energy requirements without inflicting harm on the environment.
Global collaboration is essential to achieving a balance between environmental protection and economic growth.
Quiz Questions
Which is the most widely used energy source in the United States?
Answer: D) natural gas, C) petroleum, B) nuclear power, A) coal - Correct Answer: C) petroleum
Which describes the amount of work produced compared to the amount of energy used?
Answer: D) energy efficiency, C) carrying capacity, B) sustainable energy, A) cogeneration - Correct Answer: D) energy efficiency
Excess thermal energy can be used to generate electricity that operates electrical devices within the power plant. What is this an example of?
Answer: D) fuel efficiency, C) carrying capacity, B) cogeneration, A) sustainable energy - Correct Answer: C) cogeneration
### Which involves the global management of Earth’s natural resources to meet current and future energy needs?
Answer: D) fuel efficiency, C) cogeneration, B) energy efficiency, A) sustainable energy - Correct Answer: A) sustainable energy