Climate change is a big contender (see http://climate.btmx.fr http://climate.btmx.fr). But what's most scary is that there are multiple credible slow or fast w

Climate change is a big contender (see http://climate.btmx.fr http://climate.btmx.fr). But what's most scary is that there are multiple credible slow or fast ways the whole of humanity is at risk, and that most are our own fault.