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☆☆☆☆☆The interior of the Earth is at a very high temperature. That heat from the core is the ultimate source of geothermal energy.
When the Earth was formed 4.8 billion years ago, the core was mostly molten iron and nickle. The energy to heat the core came from the gravitational energy present at the time of formation. Since then, additional heat energy has been added through nuclear decay of uranium and other heavy materials which were also included in the original formation process.
Both of them are because they evolved from little tiny creatures millions of years ago
The clean water act is in act as of today. The clean water act is making sure every person has clean water to drink.
most likely the Clean Air Act Answer: Like many milestones in human affairs the first was the most important since the first demonstrates that the law can do something about the problem, In the case of air pollution we have several choices: 300 CE: Roman law controls air emissions from certain industries in England 1272 CE: Use of Sea Coal banned by Edward I (and several folowing kings)
1895 CE: 1st US law against air pollution 1956 CE: British Clean Air Act 1963 CE: US Clean Air Act
placer deposits from where water is moving fast enough to move lighter materials.
Electric and usually gasoline.
The problem with wind energy is that it does not produce much electricity. Wind does not flow at all places. So having wind energy as a major source of electricity is not a option.
Only the private sector can create both positive and negative externalities.
Nutrient-rich soil is not a likely outcome after extensive irrigation of dry farmland
Carbon dioxide
Having more consumers would increase a private providers cost.
Power plants fall into two categoiries, These and their fuel sources are:
Thermal Power Plants
- coal
- oil
- natural gas
- biomass
Nuclear Power Plants
- Uranium
- Thorium (under investigation)
Medicare and Medicaid provide health insurance for the elderly, poor, and disabled.
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Renewable resources include biomass energy (such as ethanol), hydropower, geothermal power, wind energy, and solar energy. Biomass refers to organic material from plants or animals. This includes wood, sewage, and ethanol (which comes from corn or other plants).
