I have serious concerns about Natural Asset Companies (NACs) whose main purpose is to maximize the value of the land's "ecological services" rather than generate a profit. This can permanently lock out productive economic activity and threaten our private, federal, and state lands by prohibiting any "unsustainable activities, such as mining and energy extraction, that lead to the degradation of the ecosystems."(Margaret Byfield of American Stewards of Liberty). A NAC would stop essential economic activities like farming and grazing. The use of farm machinery and synthetic fertilizers would also be prohibited on NAC-designated land. Private interests, including foreign-owned sovereign wealth funds, could use their capital to purchase or manage farmland, national and state parks, and other mineral-rich areas. In addition to the economic harm, NAC's would cause, there are national security implications from Russian, Chinese, or Saudi sovereign wealth funds might see particular value in locking up U.S. natural resources. For these reasons, I am very opposed to the Securities and Exchange Commission (SEC) publishing a proposed rule that would create an entirely new type of NAC type company.