What measures do you think we should take in Bergen or in your immediate environment to reduce the use of fossil fuels and reduce emissions of CO2
Transition to renewable energies
promot sustainable transport/electirc cars
build energie efficent buildings/infrastructure
implement waste management strategies
What can you do yourself, and what are you willing to do to reduce the consumption of goods and the consumption of energy
use public transport
lower the consumption of goods
buy more expensive but longer lasting items
What does CCS stand for? And CCU? What does the expressions mean?
CCS and CCU refer to the process of capturing CO2 and either storing it permanently (CCS) or utilizing it by converting it into valuable products, such as fuels and chemicals (CCU). Both CCS and CCU are based on carbon capture and the difference between the two lies in what happens after the capture step.
What are so-called green, blue and gray hydrogen?
Green hydrogen: It is produced using renewable energy sources and is considered the cleanest form of hydrogen. The production process involves splitting water molecules (H2O) into hydrogen (H2) and oxygen (O2) by electrolysis
Blue hydrogen: It is produced from natural gas (CH4) through a process called “steam reforming” and uses carbon capture and storage to reduce greenhouse gas emissions
Gray hydrogen: It is the most common form of hydrogen and is generated from natural gas (CH4) through steam reforming without carbon capture and storage. This process results in higher carbon emissions compared to blue or green hydrogen
Where do we find free hydrogen? Can natural deposits of hydrogen be used?
craton zone in brasil
natural bubbling of a gaseous mixture in new caledonia
-> no, bc there are no large amounts
What is the connection between an energy chain and an energy transfer?
an energy chain represents the sequence of energy transfers, while energy transfer refers to the actual movement of energy between organisms in an ecosystem
Name some advantages and disadvantages of using hydrogen as an energy carrier
can be easily stored and transported
reliable energy – carrier
is complementary to electricity
- technology development is needed
- costs have to be reduced, hydrogen production increased
-has to be available in developing countries
What is the difference between an energy source and an energy carrier?
An energy source is a natural resource that can be converted into usable energy. Examples of energy sources include wind, …
On the other hand, an energy carrier is a substance or phenomenon that contains energy that can be later converted to other forms such as mechanical work or heat or to operate chemical or physical processes. Energy carriers include springs, electrical batteries, capacitors, pressurized air, dammed water, hydrogen, petroleum, coal, wood, and natural gas.
Why is hydrogen an energy carrier? Name some other energy carriers.
Hydrogen is considered an energy carrier because it is not found freely in nature and must be produced from other sources of energy
batteries
How should hydrogen be stored so that it can be used as fuel for cars?
under increased pressure or low temperatures
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