On April 22, we observe Earth Day, an occasion that has inspired millions of people over the decades to take steps to clean up our world. Of course, your physical surroundings are important, but you also operate in other “ecosystems” – social, cultural and political. And you’ll need to consider your investment environment, too. How can you improve it? Here are a few suggestions: ■Avoid “toxic” investment strategies. The dangers of pollution helped drive the creation of Earth Day. As an investor, you also need to watch out for “toxins” – particularly in the form of unhealthy investment techniques. For example, chasing ...