There are 3 or more discussions.
1. The Earth is getting warmer due to human activity, and it will cause issues in the near future
2. The Earth is getting warmer but it is a natural event and humans are just experiencing it.
3. The Earth is getting warmer, and it is natural, but it is going faster and hotter than normal due to humans.
This article does talk about human activity from our past to the possible future. The sediment under the water or mud holds a history of what has happened. Combined with what they are finding at Antarctica, and now in the mud, it is undeniable that we are getting warmer, and that humans are part of the issue due to trees.
Here is the link: