
One of the ways that tidal energy can be harvested is through tidal range power. Although it does take more money to build the infrastructure needed for these tidal range power to work (such as building a dam), the overall cost of the energy once its built is cheaper for civilians than solar and wind energy and can power cities with thousands of people for years. One downside to tidal range energy is that the underwater projects needed cannot be built just anywhere. There is an ideal tidal range of about 5 meters that is needed for this energy source to garner the most optimal amounts of energy. However, in the areas that are optimal, sometimes there's not enough civilization around or the people who live near that area oppose the infrastructure (such as dams) needed.
Another, more modern method of harvesting tidal energy is with tidal stream energy. This method of tidal energy doesn't need large dams or any ideal location with the correct tidal range. With this method, clusters of turbine farms can be built underwater or floating turbines can be built which is cheaper for development.
The video acknowledges that tidal energy could be detrimental to marine life because it may displace animals that live or feed in those areas, however, researchers try to compare its effects to those of climate change and reason that the effects of climate change on these marine animals by 2050 will be extremely more worse than the effects of tidal energy.
Overall, I can see why tidal energy is not as popular of an energy source as it's a fairly new energy source that still needs a lot of testing and is fairly expensive at the moment, however, I do see potential and am fascinated by the new technology that is still continuing to be developed for cleaner energy!
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Sofia MakePeace 3/08/2022 7:45 PMWow, thank you for sharing what you learned about tidal energy Jaida. I also haven't heard much about this alternative energy source, and am really curious about learning more potential solutions to the huge amount of emissions we acquire burning fossil fuels. Not only do we need to change our energy sources to reduce emissions, but fossil fuels are a finite source, and we will inevitably run out. In a recent documentary, I watched, titled Climate Crisis: Adapt or Die, researchers, deemed wind turbines the most promising form of renewable energy so far.
While wind energy is highly effective and can (and currently does) fuel entire cities with all the energy they need, many huge turbines are needed to have that scale of power produced. And, as you said, it can be unpredictable and unusable in areas with very calm wind patterns. I didn't consider how risky it would be to have the entire world relying on wind for all of its energy. Because wind can always pick up and slow down. That makes tidal energy seem really promising since we know the tides are reliant on the moon's patterns and can tract this source of energy to a T.
However, I do hope more research is going into how to harvest this energy more effectively because I know dams are extremely detrimental to marine life populations, especially for species who migrate between seasons for mating and hunting, like salmon. There are actually ecological preservation groups, like Patagonia, constantly fighting to remove dams all around the world. You pointed out that the effects of burning fossil fuels for energy are worse for these species than building dams, and that is a very good point. However, I think with more research tidal energy could be harvested without adding that extra strain on the environment. Perhaps we could rely on alternative energy sources like wind and sun until a more reliable method of harvesting this energy is available?
However, overall I feel inspired by all these renewable energy sources that are bringing us further away from robbing the Earth of its resources, and instead, building a harmonious relationship with the resources that the Earth offers at no cost, like sun, wind, and tides. I think the more we live symbiotically with the elements we're surrounded by, instead of just picking and taking the things we want, the more prosperous we will be. These energy sources (like tidal energy) could even prove to be more powerful than the ones we're using now.