Bangladesh is a low-lying riparian country located in South Asia with a largely marshy jungle coastline of 710 kilometers on the northern littoral of the Bay of Bengal.
Formed by a deltaic plain at the confluence of the Ganges (Padma) Brahmaputra (Jamuna) and Meghna Rivers and their tributaries Bangladeshs alluvial soil is highly fertile but vulnerable to flood and drought.
Hills rise above the plain only in the Chittagong Hill Tracts in the far southeast and the Sylhet division in the northeast.
Bangladesh has a subtropical monsoonal climate characterized by heavy seasonal rainfall moderately warm temperatures and high humidity.
4 In this activity you will
Learn to define a natural resource.
Learn the different natural resources in Bangladesh.
5 What is a natural resource
Any form of energy which can be used by humans.
Those things that people come in contact with that may be used to perform any useful function.
Objects materials creatures or energy found in nature that can be put to use by humans.
6 Natural Resources
Natural resources are things that are found in nature that are useful to people.
7 Natural Resources
We need natural resources to live. Natural resources are things that people and animal cant live without.
8 Natural Resources
Water is a natural resource. We can not live without it!
9 Natural Resources
Other natural resources are plants and soil.
10 Natural Resources
Animals and fish are also natural resources.
11 Natural Resources
Some natural resources like oil and gas or coal will be finished if we are not careful.
12 Natural Resources
Natural resources can be made into things we use.
13 Water Resources
1. Earth is 70 water how much is useable
14 Forests A forest is any area with a lot of trees. There are forests all over the world. The type of forest varies depending on the location of the forest for example there are tropical rain forests coniferous forests and deciduous forests. 15 Forests Forests occur naturally but they can be affected positively and negatively by human behavior. If a forest is carefully replanted and allowed to grow it can exist in balance. If the forest is cut down faster than it can grow back then it will be used up quickly. 2009 abcteach.com 16 Forests Forests serve as home to many of the organisms that live on the land. Forests are also very important because they are major contributors to recycling and cleaning the world supply of oxygen. Forests also provide wood which is useful both as a construction material and as a fuel source. 17 Fossil Fuels Fossil fuels take millions of years to form. They are the product of the fossilized remains of dead plants and animals that have been exposed to the heat and pressure deep within the earths crust. There are many types of fossil fuels such as petroleum (gasoline) natural gas and coal. 18 Fossil Fuels Fossil fuels are arguably one of the most valuable natural resources in modern times. It is estimated that 86 percent of the worlds energy comes directly from burning fossil fuels. Fossil fuels are the source of energy for almost every machine including the generators that produce electric energy. 19 Fossil Fuels Because fossil fuels take so long to form they are being consumed faster than they can be produced. Fossil fuels are a major contributor to air pollution because when they are burned they release many dangerous gases such as nitrogen dioxide methane and carbon dioxide. 20 Solar Energy The sun is the closest star to Earth. It brings heat and light to the world. Some areas of the world such as those closest to the equator have more sun than others. 21 Solar Energy The sun shines naturally but it is not affected by human activity. It cannot be used up. However its intensity varies with the seasons and it is not available at night. 22 Solar Energy The suns rays are used for energy by organisms that undergo photosynthesis. Nearly every organism on the planet gets energy through photosynthesis directly or indirectly. There are also ways that people can utilize the energy that the sun provides. 23 Solar Energy We can use solar power in simple (facing the sun to get warm using greenhouses to grow food etc.) and more complex (solar panels for heating) ways. 24 Wind Wind is caused by the uneven heating of the atmosphere. Some areas of the world such as costal regions have more wind than others because the terrain of the area is relatively flat and has few obstacles to block the wind from blowing. 2009 abcteach.com 25 Wind The wind blows naturally it is not caused by human activity and it cannot be used up. The power of the wind drives sailboats. It has been used to power windmills that grind grain. Windmills can also use the circular movement of the blades to turn a turbine. This is increasingly used as a means of generating electricity. 26 Wind Wind power does not make greenhouse gas emissions. It does not directly cause pollution. However critics of wind power say a large number of windmills could cause problems for animals especially migratory birds. Some people think the windmills are unattractive. 27 Other Resources
A. Energy Sources
1. Most energy comes directly or indirectly from the sun
2. Wind- used to move our goods and pull water form the earth.
28 Other Resources
A. Most widely distributed storehouse of the suns energy.
B. First discovered in America in 1673 in Illinois.
29 Other Resources
1. Most widely used are the metals
a. Fe Cu Al Mg Pb Zn Sn (Iron Copper Aluminum Magnesium Lead and Tin)
30 Other Resources
1. Forests lakes beaches mountains parks animals and fish
What we need to do
Land should be reformed by proper distributive justice. Khas lands need to be distributed among landless poor. Access to land should enshrined by policies.
Access to water bodies such as beel haors and baors should be guaranteed by the rural poor. Right to safe drinking water has to be ensured for the citizens. Utilization of rain water could be developed to stop overwhelming demand on ground water.
Conservation of forest is an immediate need by stopping deforestation. Government has to activate the existing laws or to enact special laws for forest conservation. Plantation of hazardous tress for forestation is a fools effort. Programs have to be undertaken to plant eco-friendly tress forestation.
32 What we need to do 4) Government should take necessary steps in regard to National Fisheries Policy (1998) conserving fish breeding grounds and habitats especially in relation to water management infrastructure such as flood control irrigation and drainage projects. 5) Government should strictly prohibit overwhelming shrimp culture 6) Government along with peoples participation should revisit policies on energy resources such as oil gas and coal and stop intervention of foreign companies in this regard. Government should also collect compensation money from foreign companies and compensate habitants of the project areas. 7) Government should take immediate steps for the conservation of ecology and bio-diversity. Environmental Conservation Act of 1995 along with other policies that are concern about ecology. Government should find the local and foreign actors who violate rights and livelihood of the marginal people. In addition government needs to make sure enabling atmosphere for marginal people to get access to natural resources 33 Waste Management
Md. Shamsul Arefin
Joint Secretary MOPA
34 What are Wastes
Definition of Wastes
Substances or objects which are disposed of or are intended to be disposed of or are required to be disposed of by the provisions of the law.
Any operation which may lead to resource recovery recycling reclamation direct re-use or alternative uses of things.
35 Kinds of Wastes
Solid Wastes Domestic commercial and industrial wastes especially common as co-disposal of wastes
Examples Plastics foam containers bottles cans papers scrap iron and other trash
Liquid Wastes wastes in liquid form
Examples domestic washings chemicals oils waste water from ponds manufacturing industries and other sources
36 Classification of Wastes according to their Properties
can be degraded (paper wood fruits and others)
cannot be degraded (plastics bottles old machines
cans Styrofoam containers and others)
37 Classification of Wastes according totheir Effects on Human Health and the Environment Hazardous wastes Substances unsafe to use commercially industrially agriculturally or economically Non-hazardous Substances safe to use commercially industrially agriculturally or economically 38 Sources of Wastes
Commerce and Industry
39 Sources of Wastes
40 Effects of waste if not managed wisely
Affects our health
Affects our socio-economic conditions
Affects our coastal and marine environment
Affects our climate
41 Effects of Waste
GHGs are accumulating in Earths atmosphere as a result of human activities causing global mean surface air temperature and subsurface ocean temperature to rise.
Rising global temperatures are expected to raise sea levels and change precipitation and other local climate conditions.
Changing regional climates could alter forests crop yields and water supplies.
This could also affect human health animals and many types of ecosystems.
42 Effects of waste
Activities that have altered the chemical composition of the atmosphere
Buildup of GHGs primarily carbon dioxide (CO2) methane (CH4) and nitrous oxide (N20).
C02 is released to the atmosphere by the burning of fossil fuels wood and wood products and solid waste.
CH4 is emitted from the decomposition of organic wastes in landfills the raising of livestock and the production and transport of coal natural gas and oil.
N02 is emitted during agricultural and industrial activities as well as during combustion of solid waste and fossil fuels.
43 WHAT SHOULD BE DONE
Improve product design to use less materials.
Redesign packaging to eliminate excess material while maintaining strength.
Work with design and implement a packaging return program.
Switch to reusable transport containers.
44 WHAT SHOULD BE DONE
- Reuse office furniture and supplies such as interoffice envelopes file folders and paper.
- Use durable towels tablecloths napkins dishes cups and glasses.
- Use incoming packaging materials for outgoing shipments.
- Encourage employees to reuse office materials rather than purchase new ones.
45 WHAT SHOULD BE DONE
- packaging waste reductions and changes in the manufacturing process
- use biodegradable materials
46 WHAT SHOULD BE DONE
As a whole
segregation at source
Composting (a mixture of decayed plants and other organic matter used by gardeners for enriching soil)
recycling and re-use
more efficient collection
more environmentally sound disposal
47 I hope this lecture about Waste management will make you aware of what is happening to our environment. Thank you for listening! Thats ends my presentation.
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