Tidal energy is a type of renewable energy powered by the movement of ocean tides. Tidal power is a type of hydroelectric energy, and is harnessed by tidal streams generators, barrages, and tidal lagoons.

Hydroelectric plants work by falling water turning turbines, which produced mechanical energy, and the generator then convert the mechanical energy into electrical energy, which can then be stored and supplied to the public. Hydroelectric energy is used all around the world, and is the most used form of renewable energy. While hydroelectricity has its pros, like being a clean source of energy, there are also negative sides to look at.

A wind turbine is a piece of machinery, typically between 60 and 120 meters tall. Wind turbines have 3 large metal blades that spin and are connected to a drive shaft which turns the generator, thus creating electricity. Wind turbines can be connected to a power grid and can supply electricity to wherever it is needed. Wind energy is fully renewable, like solar, which means it is replenished at a higher rate than it is used.

On October 13th, 2024, SpaceX launched the fifth test flight of the Starship. Towering at almost 400 feet tall, Starship is made of two components: the Starship spacecraft and the Super Heavy rocket. The Super Heavy rocket is about 230 feet tall, while the Starship rocket is about 160 feet tall. The purpose of  Starship is to soon carry crew and cargo to the Moon, and eventually Mars.

Hydrogen cars, or FCEVs, are often in debate about becoming more dominant and sustainable for the future than electric vehicles (EVs). Many people interested in buying electric cars wonder if choosing a hydrogen-powered car would be better for them in the long run. While some people prefer electric vehicles, some experts speculate that hydrogen cars can overtake the popularity of electric cars and become more dominant on the roads.