...just how bad is the situation? Our new paper shows the outlook for life on Earth is more dire than is generally understood.The research published today reviews more than 150 studies to produce a stark summary of the state of the natural world...Our paper was authored by 17 leading scientists... While the problems are too numerous to cover in full here, they include:a halving of vegetation biomass since the agricultural revolution around 11,000 years ago...about 1,300 documented species extinctions over the past 500 years, with many more unrecorded... Read more: What is a 'mass extinction' and are we in one...