https://www.vox.com/2016/10/4/13118594/2-degrees-no-more-fossil-fuels https://www.vox.com/2016/10/4/13118594/2-degrees-no-more-fos... 'As you can see, in eithe

https://www.vox.com/2016/10/4/13118594/2-degrees-no-more-fossil-fuels https://www.vox.com/2016/10/4/13118594/2-degrees-no-more-fos... 'As you can see, in either scenario, global emissions must peak and begin declining immediately. For a medium chance to avoid 1.5 degrees, the world has to zero out net carbon emissions by 2050 or so — for a good chance of avoiding 2 degrees, by around 2065. After that, emissions have to go negative. Humanity has to start burying a lot more carbon than it throws up into the atmosphere. There are several ways to sequester greenhouse gases, from reforestation to soil enrichment to cow backpacks, but the backbone of the envisioned negative emissions is BECCS, or bioenergy with carbon capture and sequestration. BECCS — raising, harvesting, and burning biomass for energy, while capturing and burying the carbon emissions — is unproven at scale. Thus far, most demonstration plants of any size attaching CCS to fossil fuel facilities have been over-budget disasters. What if we can’t rely on it? What if it never pans out? "If we want to avoid depending on unproven technology becoming available," the authors say, "emissions would need to be reduced even more rapidly."'