Actually, California is one of the most geologically complex area in the world. Which contribute to its vast amount of water reserve.
This make California a desirable environment for a lot of plants and animals which makes California as one of the best wildlife reserves in the world
hope this helps
Western Europe has warmer weather.
This process is known as thermohaline circulation. In the Earth's polar regions ocean water gets very cold, forming sea ice. As a consequence the surrounding seawater gets saltier, because when sea ice forms, the salt is left behind. As the seawater gets saltier, its density increases, and it starts to sink.
