Huoh
2100—A combination of global warming and other factors will push many ecosystems to the limit, forcing them to exceed their natural ability to adapt to climate change.
Atmospheric carbon dioxide levels will be much higher than anytime during the past 650,000 years.
Ocean pH levels will very likely decrease by as much as 0.5 pH units, the lowest it's been in the last 20 million years. The ability of marine organisms such as corals, crabs and oysters to form shells or exoskeletons could be impaired.
Thawing permafrost and other factors will make Earth's land a net source of carbon emissions, meaning it will emit more carbon dioxide into the atmosphere than it absorbs.
New climate zones appear on up to 39 percent of the world's land surface, radically transforming the planet.
Nearly up to one third of all species of plants and land animals-more than a million total-could be driven to extinction.
The IPCC reports warn that current "conservation practices are generally ill-prepared for climate change and effective adaptation responses are likely to be costly to implement."
