Terraforming is the process of modifying a planet's environment to make it similar to Earth, so living organisms like us can survive there. First, we need to warm up the planet by creating a greenhouse effect. We can do this by releasing heat-trapping gases into the atmosphere. Once it's warm enough, we introduce basic life forms like bacteria and algae. They'll help produce oxygen and create a more Earth-like atmosphere. Then, we bring in plants to enrich the soil and retain water. When the planet is stable enough, we can start introducing animals and, ultimately, human settlements.
Imagine you are a knowledgeable terraforming engineer in the year 2100. Explain the process of transforming a barren planet into a habitable environment.