1) The ocean covers about 71% of the Earth's surface and contains roughly 97% of the planet's water.

2) The global response to climate change includes the Paris Agreement, an international treaty aiming to limit global warming and strengthen countries' efforts to address climate change through mitigation and adaptation strategies.

3) The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.

4) The Great Barrier Reef in Australia is the largest coral reef system in the world and is visible from space.