The title is misleading as the article doesn't really describe hedging. It gives examples of various individuals and groups who are placing increasing value on technologies and resources related to global warming. Their investments naturally reflect their assessments, which is actually a good thing. If global warming is happening, then price adjustments are needed to encourage conservation, the search for alternatives, and the advancement of needed technologies. This is a beneficial market mechanism where people are incentivized to drive prices up or down based on their best prediction of the future. The government's role should be to provide regulation, penalties, and incentives to prevent conflicts between profit and the public's welfare. As the article points out, the current government role in this area is haphazard and largely unproductive. This situation will surely persist until there is better political agreement on what is happening with our climate.