5.6 Application of Green Technology

Green technology is the development and application of products, equipment and systems used to conserve natural environments and resources. It also includes criteria to minimise the negative effects of human activities. What are these criteria?

• conserve energy

• conserve natural resources

• encourage renewable resources

• reduce carbon footprint

Used metal containers such as aluminium tins or iron tins need to be recycled. Which of the following are the reasons for recycling them?

• Preserve natural resources

• Reduce needs to collect used tins

• Reduce the amount of waste buried in landfills

• Reduce the amount of pollution at the site of extraction of ores

Green technology promotes the development of alternative fuels from natural resources that are a renewable and efficient use of energy to replace energy from fossil fuels. Alternative energy includes

• wind energy

• bioenergy

• wave energy

• solar energy

Which of the following heavy metals ions can be removed from the waste \water through the electrolysis process?

• Na⁺

• Be²⁺

• Li⁺

• Pb²⁺

What is green technology?

• Development and application of product, equipment and systems used to conserve environment and nature

• Development of green products

• Increase transport for the country's economic development and people's livelihoods

• Increased use of fossil fuel sources but attempts to minimise or reduce the negative impact of human activity

Which of the following is a non-renewable energy?

• Solar

• Hydro

• Biomass

• Coal

What is the effect of paper recycling on nature?

• Preserves the habitat and sources of animal food in the forest

• Causes soil erosion and mud floods

• Disrupts the carbon cycle and oxygen cycle

• Disrupts the continuity of life

What are the processes that can be carried out on solid waste so that it is transformed into useful organic materials such as stabilisers and organic fertilisers?

• Recycle

• Burning

• Biological treatment

• Chemical treatment

Which of the following is socio-scientific issues in agriculture and forestry sector?

• Increased use of motor vehicles

• Large scale of open burning

• Insufficiency of fossil fuel

• Increased of solid waste disposal

5R practice is one of those recommended practices in green technology. What are the elements in the 5R practice?

• Refuse, retreat,reuse, recollect, recovery

• Reuse, reduce, recycle, re-branding, refuse

• Reuse, recycle, recovery. refuse, recollect

• Refuse, reduce, reuse, recycle, recovery