There is very little doubt that Earth is getting warmer, and that this warming is a result of human-driven gases in the atmosphere that store heat and redirect it toward our planet's surface. And Earth isn't the only planet to have experienced this so-called "greenhouse effect."
Venus is the hottest planet in the solar system and is often referred to as Earth's "evil twin." The two planets are similar in size and mass, with Venus only slightly more diminutive than Earth. They are also comparatively similar in their distances from the sun, and even started off looking remarkably similar to each other. Venus also has volcanoes like Earth, though it isn't clear if they are still active.
