1 Air, noise , water and air pollution are all major problems in our world today. 2 The exhaust fumes cars produce can cause serious health problems in big cities. 3 People who decide to go green often begin by recycling household waste like paper and glass. 4 Wind and solar power are alternative forms of energy. 5 Climate change is the long- tern diffrence in the weather of an area. 6 The more things we buy, the more waste we produce.