science form 4 chap4

CHAPTER 4

GREEN TECHNOLOGY FOR
ENVIRONMENTAL SUSTAINABILITY

TOPIC 4.1

ENVIRONMENTAL SUSTAINABILITY

GREEN TECHNOLOGY

• Development and application of product,
equipment and system used to conserve the
environment and nature.

IMPORTANCE OF GREEN
TECHNOLOGY

Overcoming the destruction of the environment
Reducing carbon emissions

Improving human health and lifestyle

Conserving the country’s natural resources
Applying renewable energy sources

EXAMPLE OF
GREEN

TECHNOLOGY
IN DAILY LIFE

Solar vehicles are used to
reduce the use of fossil fuels

EXAMPLE OF
GREEN

TECHNOLOGY
IN DAILY LIFE

Renewable energy sources
are used to generate energy

RELATING ENERGY EFFICIENCY TO
GREEN TECHNOLOGY

• National Green Technology Policy was

launched in July 2009 for Green Technology
to succeed in our country.

MAIN PILLAR THAT UPHOLD
NATIONAL GREEN TECHNOLOGY

Energy • Promoting energy efficiency
Environment • Seeking energy independence

Economy • Minimising negative effect
• Conserving the environment

• Enhancing the country’s economy
through the use of technology

Social • Improving the quality of life for all

WHAT IS ENERGY EFFICIENCY ?

• Use of less energy to carry out work at the
same or higher rate

• Without affecting the production and the
quality of the desired outcome.

EFFECT IF GREEN TECHNOLOGY IS
GIVEN PRIORITY

Energy conservation Country’s economy can Waste can be converted
can be increased be strengthened and into a cleaner and safer

wastage can be reduced form of renewable
energy

INITIATIVES
AND EFFORTS

THE

IMPLEMENTATION

OF ENERGY
EFFICIENCY

• Energy

efficiency label



INITIATIVES AND
EFFORTS THE

IMPLEMENTATION
OF ENERGY
EFFICIENCY

• Green Building Index

(GBI)

• Rating system given

to buildings with
environmentally-
friendly features

• Example : Masjid

Raja Haji Fi Sabilillah
in Cyberjaya

INITIATIVES AND
EFFORTS THE

IMPLEMENTATION
OF ENERGY
EFFICIENCY

Energy efficiency technology campaigns

INITIATIVES AND
EFFORTS THE

IMPLEMENTATION OF
ENERGY

EFFICIENCY

• Using electricity from

solar source campaign

INITIATIVES
AND EFFORTS

THE

IMPLEMENTATION

OF ENERGY
EFFICIENCY

• Consumer awareness

campaigns through
energy-saving
practices

SECTORS IN GREEN TECHNOLOGY

SECTORS IN GREEN TECHNOLOGY

• Focuses :
• Use of a cleaner and Carbon – free
alternative energy
• Replace the use of fossil fuels

• Example : hydroelectric, solar and wind

SECTORS IN GREEN TECHNOLOGY

• Focuses :
• Controlling the rate of carbon dioxide in
the air
• Emphasises soil nutrient care
• Improvement in agriculture practices

SECTORS IN GREEN TECHNOLOGY

• Focuses :

• Improvement of a cleaner transportation
infrastructure, vehicle fuel and public
transportation

SECTORS IN GREEN TECHNOLOGY

• Focuses :
• Minimising waste disposal and
wastewater into the environment
• Converting waste or wastewater into
something new

• Example : compost

SECTORS IN GREEN TECHNOLOGY

• Focuses :
• Green Building Consruction

• Example the Diamond Building, the Energy

Comission headquatrters that emphasises
• Close scrutiny of the evironment and

building
• Use of green construction materials
• Efficient use of energy and water
• Good solid waste management

Diamond Building

SECTORS IN GREEN TECHNOLOGY

• Focuses :
• Energy efficiency and energy
management programmes
• To reduce the negative effects of the :
• Greenhouse effect
• Haze
• Acid rain

SECTORS IN GREEN TECHNOLOGY

• Focuses :
• Practice of green ICT in:
• Manufacturing, design, use and disposal
of computer equipment
• Aim :
• Reduce use of dangerous materials by
using biodegradable materials
• Conserve energy

TOPIC 4.2

ENERGY SECTOR

SOCIO-SCIENTIFIC ISSUES

• Are open problems that are controversional social

issues related to science

• Emphasise moral and scientific applications on

real-world situation

SOSIO-SCIENTIFIC ISSUES

Global Air pollution Indiscriminate
warming waste disposal

Water Deforestation
pollution

GLOBAL WARMING

AIR POLLUTION

INDISCRIMINATE WASTE DISPOSAL

WATER POLLUTION

DEFORESTRATION

WHY SOSIO-SCIENTIFIC ISSUES ARISE ?

• Result of human activities
• Effect :

• Climate change cause by emission of greenhouse gases
• Effect of greenhouse gases:

• Draught / destruction of biodiversity
• Flash floods / thunderstorms
• Increase in Earth’s temperature

SOCIO-SCIENTIFIC ISSUES IN THE
ENERGY SECTOR

1. Use of non-renewable energy sources

Example : Increase each If this
Petroleum year continues,
fossil fuels
Coal according to will depleted
Natural gas the need

SOCIO-SCIENTIFIC ISSUES IN THE
ENERGY SECTOR

2. Burning of fossil fuels

Produces Increase Global
greenhouse carbon warming
dioxide gases become
gases increasingly
critical

SOCIO-SCIENTIFIC ISSUES IN THE
ENERGY SECTOR

3. Effect Burning of fossil fuels

Cause Lead to long
extreme draughts and
climate various natural
change
disasters

APPLICATION OF GREEN TECHNOLOGY
TO OVERCOME SOCIO-SCIENTIFIC
ISSUES IN THE ENERGY SECTOR

2 aspects that are emphasized in Green Technology:

1. How energy is produced and supplied

2. Efficiency in usage and distribution of energy
produced

EXAMPLE OF RENEWABLE
ENERGY

Wind energy source

• Clean energy source
• Can replace fossil fuel in the

future

EXAMPLE OF RENEWABLE
ENERGY

Hydro energy source

• Renewable energy source
• Main energy sources in the

world to generate electricity

EXAMPLE OF RENEWABLE
ENERGY

Solar energy source

• Renewable energy source
• Has potential to be developed as

Malaysia gets enough sunlight
throughout the year

EXAMPLE OF RENEWABLE
ENERGY

Geothermal energy source

• Suitable to replace fossil fuel
• However, it needs suitable

geographical factors

Usage of renewable
energy in Green
Technology :

1. Reduce the content of carbon

dioxide in the air

2. Reduce the greenhouse effect
3. Reduce climate change

GREENHOUSE EFFECT

TOPIC 4.3

WASTE AND WASTEWATER
MANAGEMENT SECTOR

SOCIO-SCIENTIFIC ISSUES

• Public should be made more aware of solid waste and wastewater

management

Why ? Change in lifestyle and socio- Increase solid
culture waste and
wastewater
Rapid development in disposal
infrastructure and economy

Growing number of global
inhabitants

EXAMPLE

Sewage, chemical

wastes and rubbish that
are disposed into the
rivers and seas

Interfere the ecosystem

of rivers, seas and the
surrounding areas

EXAMPLE

Food leftovers that are

not properly disposed
of cause environmental
pollution .

EXAMPLE

Production,

management and
decomposition of solid
waste contribute to an
increase in greenhouse
gases

Causes climate change

around the world

EXAMPLE

Around 268 million

tons of paper is
produced in a year

1 ton of paper = 2-4

tons of timber

Contributor of solid

waste

APPLICATION OF GREEN TECHNOLOGY IN
WASTE AND WASTEWATER MANAGEMENT

•Prevention and reduction

Control paper usage by recycling paper
Using paper only when it is necessary
Prepare sufficient food to prevent food wastage

APPLICATION OF GREEN TECHNOLOGY
IN WASTE AND WASTEWATER
MANAGEMENT

Sorting and recycling

Since 2015, the government encourage to sort
their household waste

To reduce the disposal at landfills