Categorieën: Alle - agriculture - irrigation - pesticides - soil

door Menesess Mel 3 jaren geleden

407

SVN3M | Environmental Science 2020-2021 Course Summary 🌳

The course on Environmental Science delves into sustainable practices in agriculture and forestry, emphasizing methods that maintain ecological balance and soil health. Key topics include pest management strategies such as chemical, biological controls, and crop rotation.

SVN3M | Environmental Science 2020-2021 Course Summary 🌳

SVN3M | Environmental Science 2020-2021 Course Summary 🌳

Human Health & The Environment

Approaches to Manage Water

Wetlands

Solar Ovens

LifeSaver Bottle

UV Water Sterilization

Earth Observation (EO) satellites

Organisms

Organism Overgrowth & Water Pollution

Attack an organism’s nervous system

Shellfish can cause serious illness

Produce toxins

Eutrophication

Phosphorus & nitrogen

Organisms Magnify Water Pollutants

Sharks, fish-eating birds, and humans

Biomagnification

Consume a lot of prey

Bioaccumulation

Phytoplankton & bacteria

Organic chemicals are resistant to degradation

Factors affecting water quality

Pathogens causing cholera, typhoid fever, hepatitis, & polio

Bacteria, viruses, and parasites endangering human health

Gastrointestinal diseases that produce toxins

Cause diseases (Celiac disease, etc.)

Bacteria carries out beneficial processes (Breaking down of organic wastes, etc.)

Purpose of water

Recreation & Beauty

Transportation

Manufacturing

Health & Hygiene

Shelter and Energy

Water lifecycle

Provides life-sustaining chemical reactions

Fills cells and supports their structure

Organisms contain over 50% liquid water

Makes life on Earth possible

Gas, solid and liquid in Earth’s atmosphere

Pollution Sources & Solution
Non-point pollution

Source cnnot be pinpointed

Point pollution

Source can be pinpointed

Canadian cans of fresh air
Motor Vehicle Emissions

Sick building syndrome (SBS)

Collection of illnesses from poor air quality

Indoor air pollution

Radon gas

Bacteria

Moulds (fungi)

Asbestos

Photochemical smog

Reduced visibility & high oxidant levels

Sulphurous smog

Cool weather, coal burning

Earth
Atmosphere

5 atmospheric layers

TROPOSPHERE

STRATOSPHERE

MESOSPHERE

THERMOSPHERE

EXOSPHERE

Oxygen and nitrogen.

Layers of gases

Blanket of air surrounding Earth

Canadian Government Initatives | Improving Air Quality
Particulate Matter Emissions

Canadian Ambient Air Quality Standards

New air quality guidelines (Federal, provincial & municipal governments)

Power Plant Emissions

Effective for removing oxides

Catalytic converters

Converts pollutants into harmless substances

Industries & Emission Reductions

Reduced amount of VOCs from gas tanks and crankcase

Technology, Legislation, & Emissions Reductions

Limit emissions from manufacturing plants and products

Canadian Environmental Protection Act, 1999

Sustainable Agriculture & Forestry

Sustainable meat production

Organic farming + wild species

Polycultures

Rotational grazing

Smart Pasture Operations

Pest Management

Controls pest poulatuion

Biological organisms

Chemical substances crop rotation

Soil conservation

Maintains soil fertility

Green manure

Mulch

Compost

Crop rotation

Perserves soil nutrients

Diversification of crops

Reduces soil errosion

Strip Cropping

Polyculture

Methods

Companion planting

Squash

Beans

Corns

Diverse species

Sustainable agriculture

With no compromises

Genetically Modified Crops

Purpose

Aesthetics

Improve crops

Virus resistance

Herbicide resistance

Insect resistance

DNA from any source

Inserting modified DNA into an organism

Irrigation

Types

Drip irrigation

Spray irrigation

Surface irrigation

Amounts vary in each country

70% of water consumption

Synthetic Pesticides

Effects on Ecosystems

Resistance

Animals

Plants

Fungi

Synthetic fertilizers

Concerns

Algal blooms leading to fish kills

Impact on aquatic ecosystems

Potassium

Monoculture

Attractive to farmers

Saame species

Growth of a single crop

Sustainable forestry

Value ecosystem services

Certify sustainably managed forests

Regenerate after harvesting

Leave Organic Matter in place

Harvest timber sustainably

Protect biodiversity

Silviculture Methods

Types of Clearcutting

Shelterwood System

Selective Cutting

Clear cutting

Removal of trees

Harvest timber & regenerate trees

Condition of the site

Age of the trees

Tree species

Development & management of forests

Roles & Services

Forestry contribution to ecosystem

Non-timber resources

Tourism

Craft & wood-carving

Medicine & personal care products

Food

Timber resources

Provide habitats

Water purification

Cycle nutrients

Phosphorus

Nitrogen

Carbon

Store carbon

Reduce soil erosion

Forest management

Basic structures

Abiotic & Biotic factors

Forest Floor

Understory

Canopy

Tropical

Temperate

Deciduous

Boreal

Canada’s forests make up 10% of world forests

Trees dominate ecosystem

Gardening/farming
Arts
Furniture selling
Landscaping/deck building
Forestry management
Soil

Soil properties

pH

Porosity

Texture

Layers of soil

Living organisms

Worms, insects, soil bacteria & fungi

Breaks down nutrients

Humus

Topsoil

Roots

Nutrients

Profile

Soil components

4 main components

Organic material

Water

Air

Mineral matter

Tardigrade

Nature's smallest animal

Urban forests & green roof

Insulation

Heat absorption

Cooling from evaporation

Shade

Heat island effect
Urban forestry

Urban environments

Long-term planning

CO2 Interference

Photosynthesis ceases

Range of temperatures

Determines optimal performance

Tropical forests

28 degrees C

Temperate forests

18 degrees C

Temperature thresholds

Trees expel unusually more CO2

Increasing temperatures

No sunlight

Reducing & Managing Waste

Waste-free & Plastic free Lifestyle
Bidet

Invented in France

Popular in Italy, Portugal, Japan, Argentina, and Venezuela

Trash fashion
Liquid-waste management
Treating sweage

Treating Storm Water

Municipal Sewage Treatment

Septic systems

Sewage water
Stirn water
Wastewater

Industry

Agriculture

Household

Solid-waste management
Control measures

Managing waste

Recycling

Pollution prevention act

Disposal of Solid Waste

Recycle

Repair

Refuse, reduce and reuse

Reduction at source

Composting

Incineration

Ocean dumping

Landfills

Open dumping

Transportation of Solid Waste

Collection of soild waste

Rag pickers

By city municipality

Effects of solid waste

Reduces aesthetic value

Causing water pollution

Disease-causing organisms

Solid waste classification

Mining waste

Hospital waste

Metal waste

Plastic waste

Liquid waste

E-waste

Solid waste

Land-waste management
Land-pollution and solid waste management

Controlling land pollution

branches

Biodegradable wastes

Branches

Leaves

Yard clippings

Reducing volume

Bioremediation

Ex situ bioremediation:

In situ Bioremediation

Hazards from waste

Nuclear waste

Hazardous waste

Municipal sold waste

Man-made causes

Radioactive wastes

Domestic waste & garbage

Agriculture waste

Mining

Urbanization

Industrial waste

Types of soil pollutants

Cadmium

Lead

Pesticides, fertilizers and other agricultural Products

Dioxins

Heavy Metals

Conservation Energy

Uranium & nuclear energy
Fission

Thermal energy

Trans mountain pipeline
Indigenous ownership key to reconciling oil industry
Energy Consumption
Fracking

Fracking in Canada

Triggers earthquakes

Under moderation due to Geology

General information

Chemicals (0.5%)

Sand (9.5%)

Water (90%)

Shale to fracture

High pressure

Pumping fluid

Classifying energy resources

Renewables

Wave & tidal

Wave energy

Heat engines

Domestic Tidal Power

Tidal turbines

Accumulate potential energy

Barrages

Low tide

High tide

Biomass

Types of biofuels

Biodiesel

Ethanol

Organic material from plants and animals

Geothermal

Types of plants

Binary Power Plants

Flash Steam Plants

Dry Steam Plants

Geothermal Heat Pumps

Electricity Generation

Ocean Thermal Energy Conversion

Ring of fire

Renewable

Heat from Earth

Hydro

Niagara falls

Generators

Turbines

Dams

Accelerated by gravity

Wind

Wind farm

Kinetic energy

Solar

Subtopic

Passive, active & photovoltaic collection

Produced by sun

Non-renewable

Alberta oil sands controversy

10% of it is economically recoverable

1.7 trillion barrels of oil

Worlds largest and accessible oil sands reserve

Coated in bitumen

Natural Gas

Arctic permafrost

Trapped within crystals of frozen water

Trapped above oil deposits

Hydraulic fracturing

Oil

Ways that oil is extracted

Extraction via SAGD

Mining & steam

Dangers of oil extraction

Aquatic organisms and birds harmed

Tanker leaks

Also known as reserviors

Coal

Dangers of coal mining

Air pollution

Land degradation

Water pollution

Dangerous occupation

Ways that coal is mined

Underground mining

Surface mining

Fossil fuels

Not expensive

Concentrated sources of chemical energy

Uranium

Provides energy to allow movement