Yes, man made change of ecosystems DO have a serious impact on nature. Check out feral cat control example in Australia http://www.convictcreations.com/animals/

Yes, man made change of ecosystems DO have a serious impact on nature. Check out feral cat control example in Australia http://www.convictcreations.com/animals/feralcat.htm http://www.convictcreations.com/animals/feralcat.htm .