At this critical stage, small amounts of capital with hands-on support can have a huge impact.

FORBES: Investing For Global Impact: Be Early Be Patient

Even if the returns are small at this stage, Evans says this project and others similar are still worth it.

CNN: Elephant-poo power electrifies zoo

At this stage it makes up a small proportion of the company's total output, but -- with 12 stadiums still being built or refurbished -- the World Cup could provide the perfect stage to spur significant expansion.

CNN: Can 'sugar seats' bring sweet taste of success to Brazil?