1
a gradual increase in world temperatures caused by gases such as carbon dioxide
2
a mass of rock and earth moving suddenly and quickly down a steep slope
3
a period of time such as a few weeks when the weather is much hotter than usual
4
a long period when there is little or no rain
5
a large amount of water covering an area that is usually dry:
6
the state of burning that produces flames that send out heat and light, and might produce smoke
