Sustainability is paramount and a consideration in almost all our daily activities, it's increasingly apparent that renewable energy is not just a passing trend. It's the future. It is farmers harnessing wind energy in the plains, it's solar arrays on city skyscrapers, and it's hydroelectric power from our bountiful rivers. We are at the precipice of a global energy transition, moving away from fossil fuels towards cleaner, renewable sources. Let’s explore what the future might hold for renewable energy.

Increased energy efficiency has been the hallmark of the past decade, and it's expected to dominate the future. The ongoing process of technological revolution in the form of AI and IoT (Internet of Things) is expected to bring in more efficient energy uses and distribution. "Smart grids" with two-way communication allow energy providers to control energy use more efficiently and provide real-time data for consumers.

Meanwhile, technology like blockchain will prove its worth in energy transition. Blockchain can allow for tracking the consumption and production of renewable energy, bringing transparency and trust to energy trading. It could create decentralized and democratized energy networks where individuals not only consume energy but produce it through renewable sources and sell it back to the grid.

Regarding green sources, solar and wind energy undoubtedly have strong future prospects. They will become the main pillars of energy production due to their increasingly competitive costs and availability. The emergence of more sophisticated and efficient solar panels and wind turbines will further drive their adoption.

Energy storage also holds a promising future. The coming years will witness a significant drop in the cost of energy storage, thanks to advancing technologies, primarily in the field of batteries. Highly efficient, ultra-strong batteries would be able to store energy during peak production times for use when the sky is cloudy or the wind doesn't blow.

Likewise, there's great growth potential for marine energy. Sources such as tidal waves and currents are relatively untapped but can provide a significant proportion of the planet's energy demand. Technological advancements and investments in these sectors will see marine energy stepping up to feasibly contribute to the renewable energy mix.

Additionally, preparing for renewable energy means preparing for electrification - shifting sectors that currently rely on fossil-fuel combustion over to electricity. This transition, especially in sectors like transportation, with electric vehicles, and homes, where electric heat pumps can replace natural gas or oil boilers, is a significant part of reducing greenhouse gas emissions and enhancing energy efficiency.

It's also crucial to mention the potential for hydrogen power. Green hydrogen, made from water electrolysis powered by renewables, is a clean fuel that can be used wherever we need high energy density, such as long-distance transportation and industrial heating.

What's the key takeaway from this glimpse into the future of renewable energy? That an energy-shift future - a future that's fully dependent on renewable energy sources - is both feasible and advantageous. We have the technology, the resources, and, increasingly, the public will. What's needed now is for policies and investments to match the urgency of our climate crisis.

The future will not be divorced from fossil fuels overnight, but with deliberate and focused efforts towards renewable energy, a sustainable energy future is within our grasp. It's a diverse, inclusive, and promising future where high-sky wind turbines coexist and complement vast fields of glistening solar panels, river dams and bubbling geysers. A future where every switch turned and vehicle driven draws power from renewable sources.