1. The 4 types of air massses that affect the United States are (1)maritine polar, mP(2) maritine tropical, mT (3) continental polar, cP (4) continental tropical, ct.

2. My favorite air mass is maritine tropical because it brings rain and it brings warm weather. I love rain it makes everything peaceful.

3.Swimming
Picnicing
Walking in the Rain
Splashing in Puddles
Wearing cool clothing

The greenhoues effect is the heating of Earth due to the presence of green house gases. The greenhouse gases are water vapor, carbon dioxide, methane, nitrious oxide, and many more. Green house gases are all produced in many ways. An example is carbon dioxide is produced in many ways, when animals breath, when dead plants and animals decay, and during natural forest fires. Man kind also produces carbon dioxide when coal, oil, and gas are burnt for energy and electricity.

The greenhouse effect impacts our lives beacuse they keep the Earth 33 degrees Celsius warmer than it would be without these gases in the atmosphere. I think the greenhouse effect is bad because it is one of the many factors of global warming.