How long do we really have to attempt to reverse climate change before it’s effectively too late?

Question: How long do we really have to attempt to reverse climate change before it's effectively too late?
- Keywords:
  climate change,
  environment,
  time
Asked by 452eneq44 to Leah on 4 Mar 2019.
- Leah Morgan answered on 4 Mar 2019:
  
  Well it’s very difficult to predict, some scientists think it’s about 25 years while other think it’s as soon as 2030. In reality it’s hard to guess because there’s so many things involved like population and government policies. It’s very frustrating!

Question: How long do we really have to attempt to reverse climate change before it's effectively too late?