The future of energy is renewable, sustainable, and clean. We need to move away from fossil fuels such as coal and oil. Luckily, there are many sources of renewable energy that can replace this dirty fuel source.

So, what does the future of clean energy look like? As clean energy technologies continue to improve and become more affordable, we can expect to see a greater shift away from fossil fuels and toward renewables. Wind, solar and hydropower currently account for just 2 percent of the world’s energy production — but if we continue on our current trajectory that number will rise significantly over the next decade.

The main sources of clean energy are wind turbines (which provide power by harnessing kinetic energy), solar panels (which generate electricity directly from sunlight) and hydroelectric dams (that convert falling water into electrical power).

These three technologies alone could meet at least 20 percent of global electricity demand by 2030 — up from 7 percent today.

The most exciting thing about clean energy is that it’s constantly improving. The cost of wind and solar has dropped dramatically over the past decade, while battery technology has advanced to the point where electric cars now have ranges comparable to those of conventional vehicles.

These improvements are driven by market forces. As technologies become cheaper and more efficient, they become more competitive against fossil fuels — which explains why clean energy is gaining ground so rapidly.

There are still plenty of challenges to overcome. Clean energy is intermittent, so we need ways to store electricity for when the sun isn’t shining and the wind isn’t blowing. We also need better ways to manage how power flows from one region or country to another. But our ability

to meet these challenges is growing every day. And by 2030, we could be living in a world that runs entirely on clean energy.