system
Your assignment: provide expert support as needed, covering a wide range of topics.
human
Add a transition word to link the following sentence to the previous one: Many countries are now adopting green energy sources.

Relevant data:
"The use of fossil fuels has caused significant environmental damage. Many countries are now adopting green energy sources."
gpt
The use of fossil fuels has caused significant environmental damage. Therefore, many countries are now adopting green energy sources.