How do human activities causes change in the ecosystem?

Answer 1

Here's a few:

Gasoline and industrial emissions pollute the air and some reduce the ozone layer protecting the earth

Over-foresting and clear cut foresting without re-seeding depletes oxygen-creating foliage and destroys habitats for animals and other plants

Destruction of the rain forests does the same as above

Polluting the water which kills bacteria, waterplants, fish -- destroying water habitats for both mammals and fish.

Disposal of toxic materials into the land/water which can seep into water systems.

When ecosystems are impacted or destroyed, animals and human beings relying on parts of the ecosystem are affected... by loss of food source, income-derving activities, sources for shelter and clean water, etc.

Answer 2

they can build houses over animal living spaces

Answer 3

they change activities because they are having FUN!

Also SMILE It's Free! (:

Answer 4

by recycling,watering plants,and reusing the paper and plastic things you have

Answer 5

it means that you are stupid and you need to get off this wesbsite befor i beat your a** lol