Coal is the number 1 global energy polluter.

Coal accounts for 50% of US electricity generation.

Except South America, all continents have substantial coal reserves.

In 2006, coal supplied 25% the world's energy.

TYPE OF ENERGY:Coal

How does it create energy?

Coal is burned in power plants.

The process to generate energy from coal involves mining the coal, then transporting, cleaning and burning

it. Water heated by burning coal converts into steam and

generates electricity.

Each stage of this process generates pollution.

Alternative Method

Coal could create energy through coal gasification which is a process which converts solid coal into a gas that an be used

for power generation.

This method is more environmentally friendly as it removes sulphur and other contaminants.

What % of the world's energy comes from

coal?In 2006, coal supplied one quarter of the world's energy.

Although this proportion has fallen steadily over the past 20 years, world production actually increased by over

60% between 1986 and 2006.

Coal production increased everywhere except Europe with Asia (including China) recording the fastest growth.

What country uses coal the most?

China.

Where is coal found?

Coal is found underground.

The biggest supply of coal is found in the USA.

Pros

Produces a lot of energy when burned

The U.S. contains one-quarter of the world's coal reserves, which could provide more energy

potential than all the known recoverable reserves of oil.

Provides jobs for Americans.

Cons

Less transportable than oil and gas because...

It contains a larger proportion of waste

It has lower calorific value than oil and gas

It is a solid and less transportable by than liquids and gases

It is less versatile than oil, having little value for the transport industry

By Als and Kels

Oilby Ella & Gin

How does oil create energy?

Oil is a form of stored energy which is released during combustion

It comes from plant matter which is decomposed to form hydrocarbons which burns as fuel

What percentage of the worlds energy comes from

oil?In America, 16.5% of their energy comes from oil

In Africa 12.1% comes from oil

The Middle East is 13.1%

More than half of Eurasias oil comes from Russia

47% of the worlds energy is from oil.

Where is oil found?

In the Middle East oil is the most accessible

Canada, Iraq, Iran, Venezuela, US, Russia, Libya

Oil is found in pores that are buried deep beneath the earths surface, between layers of hard rock

Pros for using OilNo other energy source can move vehicles with greater speed at longer distances than oil.

It creates jobs for the local economy

It can be used in cars

It can be converted into electricity

It can be used in plastics and wax

Cons for using oil Oil is nonrenewable and so it will run out

Burning oil pollutes the environment by releasing CO2 and other toxic gasses

Big oil rigs are needed to extract oil

Oil leak may occur which result in environmental disaster like killing wild live, disturbing the biodiversity of that area and this takes years to clean up

It is expensive and dangerous to transport it

Drilling for oil is unpredictable and takes a lot of time to search for oil

Thanks for listening!

Renewable Energy

HOW DOES IT CREATE ENERGY?Counts for 13% of world primary energy production80% of this energy came from combustible renewables (mainly wood for heating)17% came from hydropowerAltogether wind,tide, geothermal and solar energies contribution to total world energy production Is just 0.5%

Geothermal energy

The natural heat found in the earths crust in the form of steam, hot water and hot rock. This source of energy can be used to produce electricity or its hot water bath can be used directly for industry, agriculture etc. eg. In Iceland hot springs supply water at 86 deg c to 95% of the buildings in and around ReyhjavikThe number of countries producing power from this source could rise from 21 in 2000 to 46 in 2010The USA is the world leader in geothermal electricity and accounts for 0.37% of electricity used in the US

Where is IT found?Share of renewables by religion (total primary energy supply)

Africa holds the largest share of 49%Wind energy has an annual growth rate 48%Renewable energies rely on the elements to produce electricity therefore Hot countries are best suited to provide solar energyMountainous religions such as the Andes can provide HEPIslands can obtain great stores of tidal energy and wind energy

Positive impactS

Renewable therefore less damage to the environment Will never run out Does not aggravate global warmingReduce fossil feel dependency Decreases necessity for nuclear wasteReduces the need for importing from east (therefore improves trade balance)Unlimited (infinite) quantities

Negative impacts

Rich countries in n America and Europe have a disproportionate share of the new renewables eg. Cahora Bassa damLimited by high capital costsNeed for sophisticated technologiesVisual pollution Conservationists worry about wind turbines affects on migrating birdsHEP dams can damage fishing industries and delicate ecosystems

HEP (Hydroelectric

Power)By Frannigans N Gabbigans

HOW DOES IT CREATE ENERGY?

The 'big four' HEP nations of China, Canada, Brazil and the USA account for over 46% of the global total.

A dam is built where there is a natural lake or a big river in a valley. The dam is used to hold the water and create pressure so that the water can produce more electrical power. There is gravitational potential energy stored in the water and this energy is used to turn generators and create electricity. Electrical generators are turned by massive turbines and create electricity. Water flows through these tunnels with great pressure and is used to turn these turbines. If there is a greater volume of water or there is a very large difference between the water level and where it flows out than you can get more power out of the water as it has greater potential energy. The electrical current is created when the rotor spins around the copper wire on the stator.

Where is IT found?

Which countries are the biggest users of this source of energy?

Latin America is the biggest user of this source of energy

The UK generate about 1% of it's electricity from HEP.This figure is low because most commercially attractive and environmentally acceptable sites are already in use.However, in July 2005, Scottish ministers approved plans to build a new HEP generating station in Inverness. The new plant will generate up to 100megawatts of electricity.

Positive impactS

Out of the 5 major sources of energy, HEP is the only one which is renewable, wahoo!It is a reliable source of energy in areas where it is suitable to build a dam (I.E. fast flowing water in a valley).There is scope for small scale HEP plants to supply local communities.

Negative impacts

The dams and power plants can have a huge negative impact on the environment. They obstruct rivers causing probs 4 da aquatic lyf.They may cause deterioration in water quality.They cause large areas of land to be flooded. May cause the release of Methane gas if large forests are submerged without prior clearance.

Dam(n) jokes

What did the fish say when it swam into a wall?......

Damn!!!! Lolz