1) The direct harvesting of buffalo in America wiped them all out.
2) Back in the 1800's when they heard form was making an Advancing Technology no one believed him
3) The pollution in the air is creating global warming which is melting the polar ice caps
4) The atmospheric changes on earth are trapping greenhouse gases on our planet
5) The whales are an endangered species and close to extinction
6) The flea is an invasive species and it takes over a certain environment it is hard to get rid of them
7) Global warming is a dangerous effect of greenhouse gases
