2. CONTENS:
● Technology ● Environment ● pollution
and society al impact
● Municipal ● Depletion of ● Environment
solid waste resources al policies
3. Technology, society and the
environment
Some technological It is important to know how
advances can have an to use technological
enormous social impact. correctly, has led to social
tensions.
4. Technology and the environment
● Human evolution has led ● Pollution and waste.
to an unstoppable and ● Depletion of energy
continuos process of resources.
enviromental degradation.
● Disappearance of plant
and animal species and
habitats.
5. POLLUTION AND WASTE.
● 1 - Natural pollutants and ● 2 - Primary pollutants and
pollutants produced by secondary pollutants.
human activity.
6. ● Air pollutants , water
pollutants and land
pollutants.
7. ● Stop the production of
pollutants.
● Clean the pollutant
8. We need to make a major change
to our lifestyles by developing a
new ecological culture.
9. Air pollution.
● Causes
-Natural.
1. Volcanic emissions.
2. Meteorological
phenomena.
3. Forest fires.
- Human
1. Gas emissions from
industries.
2. Heating systemes and
exhaust pipes.
3. Radioactive particles.
10. ● Pollutants. ● Effects
Carbon dioxide (CO2). Greenhouse effect increasing
Oxides. Changes to ecosystems due to
acid rain and the ozonwe layer
Hydrocarbons.
Respiratory problems
Ozone.
Puts the lives of the sick and
Aerosols. elderly at risk
CFCs. Corrosion of buildings and other
constructions
13. Municipal solid waste (MSW)
There are two alternatives to landfill: incineration and
recycling
14. Depletion of resources and
environmental policies.
● Before the steam engine was ● Later, the combustion engine
invented, wood was the most was invented, and petroleum
commonly used energy became the main source of
resource. energy.
16. Alternative energy sources
Biofuels, obtained from organic waste.
● Bioethanol: extracted from sugar cane and used in combustion
engines.
● Biodiesel: made up of fatty acids and obtained from animals and
plants fats and even used oil.
● Biogas: obtained from biodegradation of organic matter and used in
boilers and ovens and to produce electricity in power plants.
Nuclear fusion energy, which generates less radioactive pollution
and uses elements that are naturally very abundant.
Fuel cell, which converts chemical energy into electrical energy using the
opposite of electrolysis.
18. Sustainable developtment
Sustainable development is development that meets
the needs of people in the present without
compromising the ability of future generations to meet
theirs.
Several international organisations and a growing
number of countries are trying to implement
sustainable development policies.
