Green Chemistry reduces the production of hazardous materials and chemical waste.

Outline two specific examples or technological processes of how Green Chemistry has accomplished this environmental impact.

Any two of:

replaces plastics with biodegradable/starch/cellulose based plastics

use enzymes instead of polluting detergents/phosphates

OR

use of enzymes means lower temperatures can be used

OR

use enzymes instead of emulsifiers to treat oil spills

OR

use enzymes to produce esters at lower temperatures/without sulfuric acid

replace organic/toxic solvents with carbon dioxide

replace polymers from fossil fuel with bamboo/renewable resources

develop paint resins reducing production of volatile compounds «when paint is applied»

industrial synthesis of ethanoic/acetic acid from methanol and carbon monoxide has 100% atom economy

energy recovery

Accept formulas for names.

Award mark for any other reasonable specific green chemistry example that prevents the release of pollutants/toxic chemicals into the environment by changing the method or the materials used.

Do not award mark for methods that involve clean-up of pollutants from the environment such as host-guest chemistry or alternative energy sources.

[2 marks]