What is the primary topic that Paul Hawken wrote about? 

A)  regulations about pollution and waste 
B)  global warming and deforestation in the tropics 
C)  population growth in the developing world 
D)  transforming Earth-degrading economics to Earth-sustaining economics

Earth-sustaining Economics

An economic system aimed at promoting sustainability, ensuring that economic activities do not compromise the well-being of the earth and its ecosystems.

Paul Hawken

An environmentalist, entrepreneur, and author known for his work on sustainability and the environment, particularly in relation to business and economics.

Global Warming

A gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.