Investment opportunities connected to climate change and greenhouse gas (GHG) regulation are a popular topic of discussion on this blog. Most of the time, however, the companies we discuss are relatively small, often unknown to most investors and overall pretty speculative. Yesterday, I came across an interesting article on Seeking Alpha entitled “Investing In a Greenhouse Gas-Regulated World” – the title says it all. The article looks at the question of investing in a GHG-constrained world from a conventional portfolio management perspective, and therefore argues for a low weighting in pure-play cleantech or carbon finance stocks, and a greater focus on blue-chip companies with proactive approaches to issues related to climate change and GHG. The author admits to having borrowed some of picks from an article by our very own Tom Konrad.