Tsunami

Tsunamis have hurt many people. They're caused by earthquakes some of the time. They can destroy a lot of people's personal property. People have lost their homes and lives from these tsunami's. They can track them to help and save some people but they still can't stop them.

Air Pollution

Air pollution can cause health effects. It can cause short and long term damage. It also hurts the enviornment by hurting  the ozone layer. Air pollution comes from cars. There are several types of pollution, they are smog, acid rain and the green house effect. There are various organziations trying to prevent, and create awareness. they are also trying to give knowledge of the harm it is causing to humans and the enviornment.