Information about climate change and what can be done to lessen its effects can be found all over the internet. Some reliable sources are:

The Climate Reality Project - https://www.climaterealityproject.org/

https://climate.nasa.gov/evidence/

How Global Warming Works - https://www.youtube.com/watch?v=Q2igBNKReZo

TED talks: David Roberts, many others

Biodiversity for a liveable climate - www.bio4climate.org

Bill Nye for National Geographic - https://www.youtube.com/watch?v=EtW2rrLHs08

Skeptical Science - https://skepticalscience.com/

Regenerative International - https://regenerationinternational.org/