Q. 17

List four causes

Answer :

Four causes of biodiversity loss as follows:

1. Habitat loss and fragmentation


2. Over-exploitation


3. Alien species invasions


4. Co-extinctions


OR


The two metals used in a catalytic converter are as follows:


1. Platinum-palladium


2. Rhodium


They help in keeping the environment clean by reducing the emission of poisonous gases by


1. Conversion of unburnt hydrocarbons into carbon dioxide and water


2. Carbon monoxide and nitric oxide are changed to carbon dioxide and nitrogen gas respectively.


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