Please help with this essay for an exam. Worldwide carbon footprint One of the things that worries people most nowadays is the impact that pollution is causing to the environment and how contamination is affecting our lives. Mains of transport is said to be the major emitter of pollution. In fact the amount of cars per family has increase dangerously up to two or even three vehicles. We are used to going everywhere by car. As for cars problem, the solution could be bicycles. Bikes are a healthy and cheap way to commute as well as a reducer for carbon monoxide emissions. Another worrying issue is the impact that chemical spills are causing in maritime life. Rivers and seas are reaching levels of contamination that we are going to have difficulty to reverse. Therefore, if governments raised fines to factories pouring chemicals into rivers, the industry would need to seek new ways to work. Last but not less is the misuse of energy that we are making. Renewable energy is a good point to have into consideration to solve this last issue. In brief, responsibility and awareness are the first step to try to save our shared home, the earth.