<prompt> Human: I always hear how the solar power industry is growing exponentially and spreading etc. Im wondering how I can invest into it? Im in the healthcare field so I know nothing about solar power but I would like to invest into it. Any suggestions?  <response>: Very carefully. Most solar companies that Ive looked at are very highly leveraged have a lot of debt compared to their assets and income and have crazy valuations. Most are spending far more than the income they are generating, which means they are operating at a loss and have debt. As you can imagine, thats not a sustainable model.Of course, Ill admit bias, as I am a value investor. Id recommend treading lightly and realize that youre basically gambling any money in that industry at the moment. Thats not to say theres not a place for gambling in the investment world - sometimes gambles pay off big. I just wouldnt recommend putting the bulk of your investment resources into something so risky. 