Answer:
A and C
Explanation:
A) No greenhouse gases are produced
The production of tidal energy proves that this alternative energy source is sustainable and ecological. It is minimally affecting the ecosystem, producing no greenhouses gases, carbon dioxide or a waste of any kind.
The only ecological potential downside is it effecting the marine organisms.
C) It is a renewable source of energy.
Tidal energy has proved to be a renewable source, more efficient than wind or solar energy.
It is expensive to install, but it is a more reliable and effective way to use tides that are usually constant in the sea areas.
Tidal energy is a source of clean, renewable energy that is currently on the rise and which is developed to be more effective and widespread, making it more affordable to install and use.
