The City of Port Townsend, Washington tourism guide. Learn about things to do when visiting and the history of Port Townsend with our guide of the city and surrounding area.
Learn more about how climate change will affect people and the environment in the following ways: 1  Agriculture. 2  Energy. 3  Water Supplies. 4  Health. 5  Plants, Animals, and Ecosystems. 6  Forests. 7  Recreation.
There are two main causes of climate changes - natural causes and human activities. Natural causes have influenced the earth's climates such as volcanic eruptions, ocean current, the earth's orbital changes and solar variations. The eruptions of volcanoes cause a cooling effect on the earth.