HUMAN BEINGS HUMAN BEINGS AND ECOSYSTEMAND ECOSYSTEM

Human activity alters ecosystemsHuman activity alters ecosystems

We overexploit natural We overexploit natural resources. For example, we resources. For example, we

catch too many fishcatch too many fish

We occupy natural We occupy natural spaces with our towns spaces with our towns

and cities.and cities.

We pollute the environment We pollute the environment with smoke and gas from with smoke and gas from

factories and carsfactories and cars

Words to studyWords to study

Overexploit….exploit excessively.

Natural resources: naturally occurring materials such as coal, fertile land, etc, that can be used by man

Environment:Ecology . the air, water, minerals, organisms, and all other external factors surrounding and affecting a given organism at any time.

Pollution: the introduction of harmful substances or products into the environment: air pollution.