Many nations use oceans to drill for oil which is a non-renewable resource that often damages the ocean and can cause major problems for the biome. This means also that more oil is used then so that's bad for the environment too. Sometimes there is an oil spill which kills many animals and plants that live in the ocean and cause a natural disaster. Even renewable resources from oceans like using water and dams to make electricity can be problematic because the water gets polluted. It would be best if countries switched to things like solar energy and wind energy.
Explanation:
♤decay of radioactive elements
♤ leftover heat from planetary formation
♤heat released as the liquid outer core solidifies near its boundary with the inner core.
The Panama Canal is 77 km long, and is divided into three parts, which means that during each transit, the ship will go through 3 locks - because the middle part of the canal is above the sea level. So a huge portion of the time is spent waiting in the lock to adjust to the hight of the lake in the middle of the canal.
The time to pass it is around 6 -8-10 hours - second option is the best