Les 4 - Duurzame energiebronnen

• Aardrijkskunde
• Middelbare school
• vwo
• Leerjaar 3

Planning

• Couple of questions about last week
• Energy transition
• Sustainable fuel sources

Which element are trees mainly made of?

1. Carbondioxide (CO2)
2. Water (H2O)
3. Carbon (C)
4. Oxygen (O2)

What are trees (mainly) made of?

• Plants take in carbondioxide (CO2), and 'breathe out' oxygen (O2)
• Trees are made of carbon (C)

What are the two biggest drawbacks of fossil fuels?

Energy transition

Going from fossil fuels to sustainable sources of energy

• Those don't run out
• Don't put extra CO2 in the atmosphere

going from grey to green energy

Grey energy

• Fossil fuels
• We are still dependent on these fuels
• (and on the countries delivering them)

Green energy

Sustainable sources of energy

• They don't run out
• They don't cause emissions of greenhouse gasses

Biomass energy

Burning, or decomposing bioorganic materials (plants and stuff) to make energy.

Biomass energy

The good:

• It makes use of waste
• It is renewable
• It emits no more greenhouse gasses than the plants have absorbed over their lifetime

Biomass energy

The bad:

• It still produces greenhouse gasses
• It is only renewable if no trees are cut down for it

Wind energy

Energy made from spinning turbines around using the wind

Wind energy

The good:

• Doesn't produce greenhouse gasses
• It is renewable

Wind energy

The bad:

• They are fairly ugly
• Wind is not always blowing
• We are dependent on China for the magnets

Solar energy

Energy made from the UV-radiation of the sun

Solar energy

The good:

• Doesn't produce greenhouse gasses
• It is renewable
• You can easily put them everywhere on roofs

Solar energy

The bad:

• The sun is not always shining
• We rely on China for many of the resources

Hydro electricity

Using the power of gravity and water to make energy

Hydro electricity

The good

• Water is (almost) always flowing
• No emissions
• Can be turned on when needed

Hydro electricity

The bad

• Water can get too low if there is a major drought
• It is not available to everyone

Geothermic energy

Using heat from the inside of the earth to generate electricity

Geothermic energy

The good

• Never runs out
• No emissions

Geothermic energy

The bad

• Not available to everyone

Nuclear energy

Energy created by using nuclear fission

Nuclear energy

The good

• Extremely effcient
• No greenhouse gasses
• Fairly sustainable

Nuclear energy

The bad

• It can cause disasters
• Nuclear waste

Conclusion

There are a lot of different sources of sustainable energy

But all of them have their own unique benefits, and drawbacks

Every country has to decide which is best for them

Huiswerk

opdracht 4, 5, 6 en 7 van §6.1