how to begin munc speech i mean how to address chairperson or what you will say before starting your munc speech?

Wind power has been beneficial to rachers ,farmers , and rural homeowners for decades windmills and turbines use wind power to change the winds kinetic energy into electricity where does wind power come from

How has the immigration of the 1990s affected the social and economic life of the united states?

What period of history refers to the time when people did not have written records