If you live in New Jersey, own your own home, and have a spare $25,500 kicking around, the best investment you can make, dollar for dollar, could be a set of solar panels
Put that $25,500 in the stock market and you'll see a return on investment of around $43,000 over 15 years.
If you take that same $25,500 and buy some solar panels for your house, you'll see $108,000 back as a return. Even the most cold-hearted bottom-liner can't argue with numbers like that. An investment in solar panels offers none of the downsides of the stock market and will prevent a bunch of greenhouse gas emissions to boot.
Disclaimer (1BOG did it, seems like a good idea): I am not a financial advisor. If you have money to invest, talk to an actual financial advisor or three before deciding what to do with it.