Caused of Global Warming

Global warming is caused by some actions of people. The first cause is there are a few trees which still grow on the earth. As we know that tree can produce oxygen that we need to live. The second cause is carbon monoxide from vehicles can destroy ozone layers. It makes dangerous substances from sunshine cannot be bounced by ozone layers. They will be trapped among ozone layers and the earth surfaces. In addition, the used of parfume also destroy ozone layer. Then, plastic trash also has bad influence in global warming. In addition, CFCs from air conditioners and refrigeratos also influenced it. So, there are some causes of global warming that are caused by human actions.