Accounting and Finance
One obstacle to reducing carbon emissions through any means is often money. While there are some things people can simply stop doing, larger changes like renovations, different vehicles, solar panels, and so on require money that is not necessarily available. Coming up with new and creative techniques for financing renewable energy development at ANY scale can have a large impact.
New contract means wind-powered trains in the Netherlands:
Crowdfunding renewable energy projects:
Solar hybrid technology allows 24/7 power generation: