Chapter 4: Green technology for environmental Flashcards
What is green techonolgy
the development of products, tools and systems used to conserve the environment and nature while minimising and reducing the negative effects of human activities
The importance of green technology
1) reduces carbon emissions
2) conserves the ecosystem
3) overcome the destruction of environmental and natural resources
4) improve the health status and human life
National green techology policy
1) energy
2) environment
3) economy
4) social
What is energy efficiency
the lesser use of energy to carry out work at the same rate or more without compromising on comforts or the desired results
- wastage if energy can be reduced
- national economy becomes stronger
- waste materials can be converted into renewable energy that is cleaner and safer
Sector in green technology
1) energy sector
2) agriculture and forestry sector
3) transport sector
4) waste and wastewater management sector
5) building secotr
6) industrial and manufacturing sector
7) information and communication technology (ICT) sector
socio-scientific issues in the energy sector
1) the use of non-renewable energy sources such as petroleum, natural gas and coal to generate energy is increasing If they are used continuosly, the source of fossil fuels will run out
2) the wide use of fossil fuels releases a lot of greenhouse gases like carbon dioxide and this causes global warming
3) fossil fuel combustion also contribute to the extreme climate change such as prolonged draught and other natural disasters
factors contributing to socio-scientific issues in the energy sector
1) increasing world population
2) energy demands the exceed supplies
3) waste of energy among users
4) the use of renewable energy sources as an alternative is not well established
5) the use of equipment that do not apply green technology
The application of green technology to overcome socio-scientific issues in the energy sector
1) wind
- clean energy source that can replace the usage of fossil fuels to generate electricity
2) solar energy source
- great potential to be developed cuz malaysia recieves sufficient sunlight throughout the year
3) hydro energy source
- one of the world’s main energy sources today to generate electricity
4) geothermal energy source
- heat energy from the inner part of the earth can be used to generate electricity
5) biomass energy source
socio-scientific issues in the waste and wastewater management
1) rubbush, chemical waste and sewage dumped into the rivers and oceans cause pollution and disruption to ecosystem
2) food wastes that are not properly disposed of cause environmental pollution and health problems
3) solid waste disposal and management increase the release of greenhouse gases causing the world climate to change
4) the production of paper which is increasing year by year, makes paper the major contributor of solid waste
Application of green technology in handling socio-scientific issues of waste and wastewater management sector
1) prevention and reduction
- minimise the use of paper
- prepare food at home according to the needs of the family to avoid wasteage
2) sorting and recycling
- recycling waste such as plastic and paper can reduce solid waste in landfills
3) treatment and processing
- convert solid waste into useful organic matter / biomass energy source
4) Refuse, reduce, reuse, recycle and recovery (5R)
socio-scientific issues in agriculture and forestry sector
1) deforestation
2) open burning
3) extensive logging
4) the use of insecticides and chemical fertilisers
- chemical absorbed into the soil will flow to nearby river and cause water pollution
application of green technology to overcome socio-scientific issues in argiculture and forestry sector
1) replant trees
2) control logging activities to preserve forest resources
3) practise organic agriculture
socio-scientific issues in transportation sector
1) the burning of fossil fuels which are petrol and diesel in motor vechicles releases carbon dioxide and carbon monoxide gas. These gases cause greenhouse effect
2) most moto vehicles use petrol and diesel derived from petroleum as fuel. Petroleum is non-renewable energy source. The wide use of petroleum will cause it to run out in future
application of green technology to overcome socio-scientific issues in transport sector
1) green transportation
- bicycle, public transportation,
2) natural gas vehicles
3) biofuel
- replacement to petroleum
- produced from vegetable oils and animal fats
What is carbon footprint
the amount of greenhouse gases released, namely carbon dioxide into the atmosphere resulting from human activities such as open burning, fossil fuel burning and smoke emission from vehicles
