12.1 Finite and renewable resources
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What are natural resources
They are finite or renewable
Definition of finite resources
Those that are being used up at a faster rate than they can be replaced
Examples of finite resources
Fossil fuels - coal, crude oil and natural gas
What are renewable resources
Those that can be replaced at the same rate at which they are used up
Examples of renewable resources
Crops used to make biofuels
Examples of how the chemical industry use natural resources as the raw materials to make new products
• metal ores used to extract metals • crude oil used to make polymers and petrochemicals • limestone to make cement and concrete • crude oil to make the petrol, diesel and kerosene for transport
Why are industries moving towards renewable resources
to conserve finite resources and to imrpove sustainability
Def of sustainability
Developments that meet the needs of society now without endangering the ability of future generations to meet their needs
Why are their only estimates of the time left before fossil fuels run out
• uncertainty • how accurately do we know the amounts of finite resources on earth? What will be the future rate of use? New sources? Effect of recycling resources valid in the future?
Examples of finite resources used by chemical industry
crude oil, metal ores, mineral deposits, natural gas
Def of natural resources
Substances found in nature
Def of synthetic resources
manmade substances