Commodity market
However, this is not the only way in which commodity thinking interacts with ecologists' thinking.  Hedging began as a way to escape the consequences of damage done by natural conditions.  It has matured not only into a system of interlocking guarantees, but also into a system of indirectly trading on the actual damage done by weather, using "weather derivatives".  For a price, this relieves the purchaser of the following types of concerns: