Farmers are raising concerns the federal government's plan to reduce the emissions of big polluters would rely too heavily on carbon credits from agriculture.
This week, the world's population ticks over a historic milestone. But in the next century, society will be reshaped dramatically - and soon we'll hit a decline we'll never reverse.
ABC experts Michael Rowland, Barbara Miller and Casey Briggs answered your questions on the US midterm election results and what it means for the future.