Climate change had a big effect on people living in Sweden a long time ago, from the Stone Age to the Iron Age. Let's break it down into simpler points.

1. Changes in the Environment:

   • After the last Ice Age ended about 10,000 years ago, the weather got warmer.
   • This warmer climate allowed forests to grow, covering about 40% of the land.
   • These forests gave early hunters and gatherers the resources they needed.

2. Moving Populations:

   • As the temperatures increased, people began to move north to find new resources.
   • During a time called the Mesolithic (around 9,000 to 5,000 years ago), people started settling along the coasts because sea levels were rising.

3. Advancements in Farming:

   • A change called the Neolithic began around 4,000 years ago, which is when people started farming.
   • Because the climate became more stable, they began growing crops like wheat and barley.

4. Impact on Culture:

   • The changes in climate helped create trade networks.
   • These networks improved travel routes, making it easier for people to trade goods and share ideas.

Overall, climate change played a key role in shaping the lives of people in ancient Sweden.