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Leaving certificate biology
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Unit 1Ecology theory5 Topics|1 Quiz
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Nutrient recycling4 Topics|1 Quiz
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Ecological relationships and population dynamics2 Topics
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Human impact on the ecosystem2 Topics
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Study of a grassland ecosystem3 Topics
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Responses in the Flowering Plant4 Topics|1 Quiz
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Unit 3Sexual reproduction in the flowering plant1 Topic
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The human reproductive system3 Topics
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The menstrual cycle2 Topics
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Pregnancy2 Topics
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The circulatory system4 Topics
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Blood5 Topics
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The heart5 Topics
Lesson 4, Topic 2
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Conservation and wastemanagment
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What is conservation ?
Conservation is the wise management of our existing natural resources in order to allow as many species as possible to survive
What are the benefits of conservation?
- Maintains our food supply
- Maintains biodiversity and possible sources of drugs
- Promotes recreation and tourism
An example of conservation in practice
Forestry:
- Different species of trees are planted
- Tree felling is regulated
Why is it important to manage waste ?
- Waste management is needed to reduce pollution as much as possible
Ways in which waste is disposed?
- Stored in landfill sites
- Recycled
- Destroyed in incinerators
Waste disposal issues
- Shortage of landfill sites to take all the waste
- Landfill sights are unsightly , smell and pollutes local water supplies
- Harmful gases are released when waste is incinerated
An example of waste management
- In forestry, large tree branches are used to make sawdust and MDF
- Smaller branches are left to decay for recycling nutrients
The role of micro-organisms in waste management ad pollution control
Bacteria and fungi are major decomposes in the following areas:
- Sewage treatment plants
- Compost heaps
- Digesters
- Landfill sites
- Soil contaminated with pesticides and chemicals from industry
Waste minimisation
- Reuse
- Recycle
- Reduce