CONTENS:● Technology ● Environment ● pollution and society al impact● Municipal ● Depletion of ● Environment solid waste resources al policies
Technology, society and the environmentSome technological It is important to know howadvances can have an to use technologicalenormous social impact. correctly, has led to social tensions.
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.
POLLUTION AND WASTE.● 1 - Natural pollutants and ● 2 - Primary pollutants and pollutants produced by secondary pollutants. human activity.
● Air pollutants , water pollutants and land pollutants.
● Stop the production of pollutants.● Clean the pollutant
We need to make a major change to our lifestyles by developing a new ecological culture.
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.
● 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
Municipal solid waste (MSW)There are two alternatives to landfill: incineration andrecycling
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.
Alternative energy sources(biofuels)Bioethanol Biogas biodiesel
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 pollutionand uses elements that are naturally very abundant. Fuel cell, which converts chemical energy into electrical energy using theopposite of electrolysis.
Sustainable developtmentSustainable development is development that meetsthe needs of people in the present withoutcompromising the ability of future generations to meettheirs.Several international organisations and a growingnumber of countries are trying to implementsustainable development policies.