Answer :
1. they smoke that cause the green house effect
2.the gasoline from cars goes into the air that you breath and the gas has cause pollution
3.by littering.The garbage that you liter with goes into the sewer which leads to the sea and can effect the sea animals and the sea food eaters
2.the gasoline from cars goes into the air that you breath and the gas has cause pollution
3.by littering.The garbage that you liter with goes into the sewer which leads to the sea and can effect the sea animals and the sea food eaters
