The race towards clean energy comes as, according to the World Economic Forum, half the necessary reductions in carbon emissions must come from energy technologies that haven't reached commercial markets yet.

Betteries is a Berlin-based company that aims to help in the clean energy sector by repurposing used batteries into sustainable and affordable battery packs.

This helps especially since there are more than 8 million electric vehicles on the road and as demand continues to grow, the amount of batteries that could end up as waste will be significant.

SolarGaps is a company originating from California that is finding a new way to distribute energy that it hopes will power future homes and offices.

The company developed a new type of solar panels, called "smart blinds", which are able to track the sun and draw power from sunlight, while also providing shade to keep the building nice and cool, reducing air conditioning usage by as much as 30%.

Cambridge Industries is a startup founded in Addis Ababa, Ethiopia and it offers waste management and renewable energy generation solutions.

The company was able to develop the first waste-to-energy sustainable city park in Africa, with the use of bioreactors and insect farms. With these systems, Cambridge Industries are able to process up to 1.400 tons of municipal waste per day and over the course of a year, it is able to produce around 185 GWHr of energy that it supplies to the national power grid.

SOLshare is another startup that aims to improve the clean energy sector by providing energy trading platforms to low-income households.

The service offered by the Bangladesh-based company implies that houses that are equipped with solar panels can sell their energy excess to others who needed it through a microgrid.

This peer-to-peer electrification system enables people who live in the rural area to become energy traders while also providing their own energy.

These are just four of the startups that aim to revolutionize the global energy system in order to allow for a cleaner future. By investing in clean energy, these companies could offer solutions that will benefit current and future generations, as well as the planet.