We had different plants and stuff back then and the sun itself was less intense at the time
Discussion
Yes, because they thrived in the high c02 environment. The planet is constantly changing and always adapts.
To think that humans adding a tiny bit of CO2 to the incredibly benign .04% of co2 that exists in the atmosphere will harm the earth is a bit silly, don't you think?
The earth existed long before and will exist long after humans are gone.
The amount of CO2 humans have added isn't tiny
You're ignoring reality