3 Natural ResourcesNatural resources are substances we obtain from the land, water, and air around us.People use many of the Earth's natural resources. All of the products we use have a natural resource base.Natural resources are either renewable or nonrenewable.When we use resources to help us do work or for energy they are called energy resources.
4 NONRENEWABLE RESOURCES A nonrenewable resource is a natural resource that cannot be re-made or re-grown at a scale comparable to its consumption (rate of use).Examples: fossil fuels- oil, coal, natural gas, nuclear energy
5 COAL, PETROLEUM, AND GASCoal, petroleum(oil), and natural gas are considered nonrenewable because they can not be replenished in a short period of time. These are called fossil fuels.
6 Fossil Fuels Coal, Oil and Gas are called "fossil fuels" because they have beenformed from the fossilized remains of prehistoric plants and animals.They provide around 66% of the world's electrical power, and 95% of the world's total energy demands
9 Advantages to Using Fossil Fuels Very large amounts of electricity can be generated in one place using coal, fairly cheaply.Transporting oil and gas to the power stations is easy.Gas-fired power stations are very efficient.A fossil-fuelled powerstation can be builtalmost anywhere.
10 Disadvantages of Using Fossil Fuels The main disadvantage is pollution.Burning any fossil fuel produces carbon dioxide, which contributes to the "greenhouse effect", warming the Earth.Burning coal produces sulphur dioxide, a gas that contributes to acid rain.With the United States importing 55% of its oil, oil spills are a serious problem.Mining coal can be difficult and dangerous. Strip mining destroys large areas of the landscape.
11 Nuclear fission uses uranium to create energy. NUCLEAR ENERGYNuclear fission uses uranium to create energy.Nuclear energy is a nonrenewable resource because once the uranium is used, it is gone!
12 Advantages to Using Nuclear Power Nuclear power costs about the same as coal, so it's not expensive to make.Does not produce smoke or carbon dioxide, so it does not contribute to the greenhouse effect.Produces huge amounts of energy from small amounts of fuel.Produces small amountsof waste.Nuclear power is reliable.
13 Disadvantages of Nuclear Power A highly toxic byproduct is produced. Although not much waste is produced, it is very, very dangerous.It is difficult to dispose of the waste. It must be sealed up and buried for many years to allow the radioactivity(which can cause cancer) to die away.Mining for Uranium destroyshomes and animal habitats.
14 Bellringer:List each type of nonrenewable energy resource we discussed yesterday. Give an advantage and disadvantage of each.
15 RENEWABLE RESOURCESRenewable resources are natural resources that can be replenished in a short period of time.● Solar ● Geothermal● Wind ● Biomass● Water
17 Advantages to solar power Solar energy is freeproduces no waste or pollutioncan be used where there is no easy way to get electricityHandy for low-power uses such as solar powered garden lights and battery chargers
18 Disadvantages to Solar Power Doesn't work at night.Very expensive to build solar power stations.Solar cells cost a great deal compared to the amount of electricity they produceCan be unreliable unless you're in a very sunny climate.
20 Advantages to Wind power Wind is freeProduces no waste or greenhouse gases.The land beneath can usually still be used for farming.A good method of supplying energy to remote areas.
21 Disadvantages of Wind Power The wind is not always predictableCan kill birds - migrating flocks tend to like strong winds. Splat!Can affect television reception if you live nearby.Noisy
22 WATER or HYDROELECTRIC ENERGY Energy from the flow of water.
23 Advantages of Hydroelectricity Once the dam is built, the energy is virtually free.No waste or pollution produced.Much more reliable than wind or solar power.Water can be stored above the dam ready to cope with peaks in demand.It forms a lake people can use for recreation.Hydro-electric power stations can increase to full power very quickly, unlike other power stations.Electricity can be generated constantly.
24 Disadvantages to Hydro-electricity The dams are very expensiveto build.Building a large dam will flooda very large area upstream, this destroys animal habitats.Only available where there is moving water.Water quality and quantity downstream can be affected, which can have an impact on plant life.It disrupts fish migration patterns.
25 Energy from burning organic or living matter. BIOMASS ENERGYEnergy from burning organic or living matter.
26 Advantages to Biomass The fuel tends to be cheap. Less demand on the Earth's resources.
27 Disadvantages to Using Biomass Collecting the waste insufficient quantities can bedifficult.We burn the fuel, soit makes greenhouse gases.Some waste materials are not available all year round.
28 Energy from Earth’s heat. GEOTHERMAL ENERGYEnergy from Earth’s heat.
29 Advantages to Geothermal Power Does not produce any pollution.The power stations do not takeup much room, so there is notmuch impact on the environment.Once you've built a geothermal power station, the energy is almost free.
30 Disadvantages to Geothermal Power There are not many places where you can build a geothermal power station. (You need hot rocks of a suitable type, at a depth where we can drill down to them. The type of rock above is also important, it must be of a type that we can easily drill through. )Sometimes a geothermal site may "run out of steam", perhaps for decades.Hazardous gases and minerals may come up from underground, and can be difficult to safely dispose of.
31 What are the differences between nonrenewable and renewable resources? SUMMARYWhat are the differences between nonrenewable and renewable resources?