If current growth in renewable energy continues, and if countries take action on cutting greenhouse gases such as methane, then next year could be the year in which greenhouse gas emissions at last reach their peak.
These are big ifs. The finding, from a respected group of scientists, is heavily hedged. Renewable energy rates could falter, fossil fuel companies will continue to seek to expand, and countries may fail to take the action needed.
But if the long-awaited peak can be reached, and if emissions continue to fall in the following years, it would mark a watershed moment for humanity.
