What 2 types of air masses are responsible for causing severe thunderstorms and tornados?

Explain: plate tectonics and people.

The increase of pollutants from in mexico has raised concerns about garage to health and the environment

Why did the belgian parliament pass laws to decentralize its government? a. to increase trade with neighboring luxembourg b. to decrease the political power enjoyed by the flemish c. to enable belgium to join the european union d. to reduce tensions between belgium's two main ethnic groups