How is progress determined in an Earth-sustaining economy? 

A)  by the extent of pollution increase 
B)  by the bottom line 
C)  by the increase in use of nonrenewable materials 
D)  by the extent of the sustainable use of renewable resources

Progress in an Earth-sustaining economy is determined by the extent of the sustainable use of renewable resources. This means that economic development should not come at the expense of depleting natural resources or causing environmental degradation. Instead, the focus should be on creating a sustainable economic system that can meet the needs of the present without compromising the ability of future generations to meet their own needs. Progress can be measured by the extent to which renewable resources are used sustainably and preserved for future generations.