Sustainability Flashcards

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1
Q

Sustainability

A

The conservation of balance in the worlds ecology indefinitely

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2
Q

Sustainable development

A

Development that meets the needs of the present without compromising the ability of future generations to meet their own needs

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3
Q

3 pillars of sustainability

A

Environmental , economic, social

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4
Q

Population growth and sustainability

A

Increases demand for water, food, land for houses, and consumption of natural resources

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5
Q

Fuel

A

Any substance that burns in oxygen to produce heat

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6
Q

Fossil fuel

A

Fuels that were formed from the remains of plants and animals that lived millions of years ago

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7
Q

Hydrocarbons

A

Compounds consisting of hydrogen and carbon only . What fossil fuels are made of.

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8
Q

Chemical formula of burning fossil fuel

A

Methane + oxygen —-> carbon dioxide + water

CH4 +2O2 —-> CO2 +2H2O

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9
Q

Greenhouse effect is

A

The natural trapping of the Sun’s energy by the atmosphere with the help of greenhouse gases like co2

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10
Q

Enhanced greenhouse effect

A

Increasing concentrations of co2 causing the earth to get warmer

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11
Q

Global warming

A

The extra warming that results from the enhanced greenhouse effect

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12
Q

Biofuels

A

Fuels made from plants eg rapeseed oil

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13
Q

Examples of raw materials

A

Crude oil, timber(wood)

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14
Q

Fractional distillation

A

The crude oil is heated and various fractions are separated from it by distillation

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15
Q

Products of crude oil

A

Petroleum, diesel, central heating oil

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16
Q

Pollution

A

The addition of harmful substances to the environment in quantities greater than can be dealt with efficiently by the environment itself

17
Q

Examples of pollutants

A

Sewage, excessive fertilizers, toxic substances

18
Q

Reasons to recycle plastic

A

Save crude oil

  • keep plastic cheap
  • keep cost of waste disposal cheap
  • reduce litter (plastics are non-biodegradable)
19
Q

Plastic types

A

PET -poly
HDPE- high density poly
LDPE- low density poly