Video Hub U2.

the most important thing you have

to use heat to make something hard

Someone who grows enough food to live on but not to sell

a white powder made by crushing

to lose strength and disappear

to hit something very hard

to stop sleeping

relating to public health, especially the provision of clean drinking water and adequate sewage disposal.

a very deep hole in the ground made in order to get water or oil

a tropical plant with roots that can be eaten