Humans have caused about 1.0°C (1.8°F) of global warming since pre-industrial levels, according to scientific estimates.

At the current rate, global warming is likely to increase to 1.5°C (2.7°F) between 2030 and 2052. 4°C by 2100.

Limiting warming to 1.5ºC (2.7°F) isn't impossible, but would require unprecedented transitions in all aspects of society.

CO2 concentration in Earth's atmosphere currently at 412 parts per million, the highest it has been in 800k years. Current rates of CO2 emissions today are 10x greater than they were during the end permian mass extinction which killed 97% of life on Earth.

at 2 degrees global temp rise (we are on track to hit 2 degrees by 2050 population 8 billion)
- agriculture yields significantly less bountiful
- less food for more people
-hurricanes and floods, extreme weather would dramatically increase
-4x as many wildfires in California .

4 degrees global temp rise (we are on track to hit 4-5 degrees by 2100 population 11 billion)
-all major ice sheets in the planet would begin permanent irreversible melt which means we would lose all ice no matter what we did that ice together would add at least 200 feet of sea level rise to the planet, inundate every single beach you've ever been to. the entire coastline of the world on which 2/3 of all major cities exist would be unrecognizable.
-world gdp 20-30 percent smaller than it would be without climate change. 30 percent is an impact twice as deep as the great depression in the 1930s and it would be forever. roughly 600 trillion dollars in global climate damages which is double the amount of money than currently exists in the world
-agricultureal yields would be half as productive.
-mosquitos carrying dengue and malaria would reach around the world up to the arctic circle.

notes taken from years of living dangerously project with david wallace wells

Forests are a fundamental component of our planet's recovery. They are the best technology nature has for locking away carbon. And they are centers of biodiversity. The wilder and more diverse forests are the more effective they are at carbon sequestration. 1900 75% of Costa Rica was covered in forest. by 1980 it was down to 25%. With Government incentives to plant native tree species, today, 40 years later 50% of the nation is covered in forests.If we could apply this scenario to the entire planet, the additional forests would sequester up to 2/3 of all carbon emissions emitted by humans to date.