What is one component of an environmental revolution? 

A)  environmental groups becoming more radical in their behaviour 
B)  a sufficiency revolution in which the basic needs of only certain people are met 
C)  an efficiency revolution to conserve energy and matter 
D)  a cultural revolution

What is magma? 

A)  It is molten rock. 
B)  It is an air pollutant given off by geothermal energy. 
C)  It is a deep source of fossil fuel. 
D)  It is a cooled lava flow.